基于51单片机的万年历，用到了单片机独立键盘、数码管、LED灯模块实现。
想要简单还是DS1302好用。
1 /************************************************** 2 3 作者：纟彖氵戋 博客：http://www.cnblogs.com/yllinux/ 4 5 时间：2017年6月7日 6 7 目标：利用单片机独立键盘、数码管、LED灯模块实现万年历（算法实现） 8 9 ***************************************************/ 10 #include <reg52.h> 11 #define uchar unsigned char 12 #define uint unsigned int 13 14 uchar a[] = { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x80 }; //字形码表0~9和. 15 uchar b[] = { 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0xff }; //数码管位码表1~8和0 16 uchar c[] = { 0x3f,0xf3,0xcf }; 17 uint year = 2100; 18 uchar month = 2, day = 14; 19 uchar hour = 8, minute = 40, second = 0; 20 uchar count; //时钟计数 21 uchar n = 1; //年月日调位指示 22 uchar j = 1; //时分秒调位指示 23 24 sbit Key1 = P3 ^ 0; //计时停止 25 sbit Key2 = P3 ^ 1; //调位 26 sbit Key3 = P3 ^ 2; //加一 27 sbit Key4 = P3 ^ 3; //切换 28 sbit LED1 = P1 ^ 0; //可删此灯，有冲突 29 sbit we = P2 ^ 7; 30 sbit du = P2 ^ 6; 31 32 void Delayms(uint z) 33 { 34 uint x, y; 35 for (x = 0; x < z; x++) 36 for (y = 0; y < 114; y++); 37 } 38 39 //时分秒显示函数 40 void Dispaly1(uchar hour, uchar minute, uchar second) 41 { 42 //数码管1 43 P0 = b[8]; 44 we = 1; 45 we = 0; 46 P0 = a[hour / 10]; 47 du = 1; 48 du = 0; 49 P0 = b[0]; 50 we = 1; 51 we = 0; 52 Delayms(1); 53 //数码管2 54 P0 = b[8]; 55 we = 1; 56 we = 0; 57 P0 = a[hour % 10]; 58 du = 1; 59 du = 0; 60 P0 = b[1]; 61 we = 1; 62 we = 0; 63 Delayms(1); 64 //数码管2小数点 65 P0 = b[8]; 66 we = 1; 67 we = 0; 68 P0 = a[10]; 69 du = 1; 70 du = 0; 71 P0 = b[1]; 72 we = 1; 73 we = 0; 74 Delayms(1); 75 //数码管3 76 P0 = b[8]; 77 we = 1; 78 we = 0; 79 P0 = a[minute / 10]; 80 du = 1; 81 du = 0; 82 P0 = b[2]; 83 we = 1; 84 we = 0; 85 Delayms(1); 86 //数码管4 87 P0 = b[8]; 88 we = 1; 89 we = 0; 90 P0 = a[minute % 10]; 91 du = 1; 92 du = 0; 93 P0 = b[3]; 94 we = 1; 95 we = 0; 96 Delayms(1); 97 //数码管4小数点 98 P0 = b[8]; 99 we = 1;100 we = 0;101 P0 = a[10];102 du = 1;103 du = 0;104 P0 = b[3];105 we = 1;106 we = 0;107 Delayms(1);108 //数码管5 109 P0 = b[8];110 we = 1;111 we = 0;112 P0 = a[second / 10];113 du = 1;114 du = 0;115 P0 = b[4];116 we = 1;117 we = 0;118 Delayms(1);119 //数码管6120 P0 = b[8];121 we = 1;122 we = 0;123 P0 = a[second % 10];124 du = 1;125 du = 0;126 P0 = b[5];127 we = 1;128 we = 0;129 Delayms(1);130 }131 132 133 //年月日显示函数134 void Dispaly2(uint year, uchar month, uchar day)135 {136 //数码管1137 P0 = b[8];138 we = 1;139 we = 0;140 P0 = a[year / 1000];141 du = 1;142 du = 0;143 P0 = b[0];144 we = 1;145 we = 0;146 Delayms(1);147 148 //数码管2 149 P0 = b[8];150 we = 1;151 we = 0;152 P0 = a[(year % 1000) / 100];153 du = 1;154 du = 0;155 P0 = b[1];156 we = 1;157 we = 0;158 Delayms(1);159 160 //数码管3161 P0 = b[8];162 we = 1;163 we = 0;164 P0 = a[(year % 100) / 10];165 du = 1;166 du = 0;167 P0 = b[2];168 we = 1;169 we = 0;170 Delayms(1);171 172 //数码管4173 P0 = b[8];174 we = 1;175 we = 0;176 P0 = a[year % 10];177 du = 1;178 du = 0;179 P0 = b[3];180 we = 1;181 we = 0;182 Delayms(1);183 184 //数码管4小数点185 P0 = b[8];186 we = 1;187 we = 0;188 P0 = a[10];189 du = 1;190 du = 0;191 P0 = b[3];192 we = 1;193 we = 0;194 Delayms(1);195 196 //数码管5197 P0 = b[8];198 we = 1;199 we = 0;200 P0 = a[month / 10];201 du = 1;202 du = 0;203 P0 = b[4];204 we = 1;205 we = 0;206 Delayms(1);207 208 //数码管6 209 P0 = b[8];210 we = 1;211 we = 0;212 P0 = a[month % 10];213 du = 1;214 du = 0;215 P0 = b[5];216 we = 1;217 we = 0;218 Delayms(1);219 //数码管6小数点220 P0 = b[8];221 we = 1;222 we = 0;223 P0 = a[10];224 du = 1;225 du = 0;226 P0 = b[5];227 we = 1;228 we = 0;229 Delayms(1);230 //数码管7231 P0 = b[8];232 we = 1;233 we = 0;234 P0 = a[day / 10];235 du = 1;236 du = 0;237 P0 = b[6];238 we = 1;239 we = 0;240 Delayms(1);241 //数码管8242 P0 = b[8];243 we = 1;244 we = 0;245 P0 = a[day % 10];246 du = 1;247 du = 0;248 P0 = b[7];249 we = 1;250 we = 0;251 Delayms(1);252 }253 254 void Keyscan1()255 {256 static uchar i = 0;257 if (Key1 == 0)258 {259 Delayms(5); //消抖 260 if (Key1 == 0)261 while (!Key1); //等待按键弹起262 i++;263 }264 if (i % 2 == 1)265 {266 LED1 = 0;267 TR0 = 0;268 }269 if (i % 2 == 0)270 {271 LED1 = 1;272 TR0 = 1;273 }274 if (Key2 == 0)275 {276 Delayms(5);277 if (Key2 == 0)278 while (!Key2);279 j++;280 if (j == 3)281 j = 0;282 }283 if (j % 3 == 1)284 {285 if (Key3 == 0)286 {287 Delayms(5);288 if (Key3 == 0)289 while (!Key3);290 second++;291 if (second == 60)292 second = 0;293 }294 }295 if (j % 3 == 2)296 {297 if (Key3 == 0)298 {299 Delayms(5);300 if (Key3 == 0)301 while (!Key3);302 minute++;303 if (minute == 60)304 minute = 0;305 }306 }307 if (j % 3 == 0)308 {309 if (Key3 == 0)310 {311 Delayms(5);312 if (Key3 == 0)313 while (!Key3);314 hour++;315 if (hour == 24)316 hour = 0;317 }318 }319 }320 321 void Keyscan2()322 {323 static uchar m = 0;324 if (Key1 == 0)325 {326 Delayms(5);327 if (Key1 == 0)328 while (!Key3);329 m++;330 if (m == 3)331 m = 0;332 }333 if (m % 2 == 1)334 {335 LED1 = 0;336 TR0 = 0;337 }338 if (m % 2 == 0)339 {340 LED1 = 1;341 TR0 = 1;342 }343 if (Key2 == 0)344 {345 Delayms(5);346 if (Key2 == 0)347 while (!Key2);348 n++;349 }350 if (n % 3 == 1)351 {352 if (Key3 == 0)353 {354 Delayms(5);355 if (Key3 == 0)356 while (!Key3);357 day++;358 if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) //是闰年359 {360 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)361 {362 if (day == 32)363 {364 day = 0;365 }366 }367 if ( month == 4 || month == 6 || month == 9 || month == 11 )368 {369 if (day == 31)370 {371 day = 0;372 }373 }374 if (month == 2)375 {376 if (day == 29)377 {378 day = 0;379 }380 }381 } 382 else //不是闰年383 {384 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)385 {386 if (day == 32)387 {388 day = 0;389 }390 }391 if ( month == 4 || month == 6 || month == 9 || month == 11 )392 {393 if (day == 31)394 {395 day = 0;396 }397 }398 if (month == 2)399 {400 if (day == 30)401 {402 day = 0;403 }404 }405 }406 407 }408 }409 if (n % 3 == 2)410 {411 if (Key3 == 0)412 {413 Delayms(5);414 if (Key3 == 0)415 while (!Key3);416 month++;417 if (month == 12)418 month = 0;419 }420 }421 if (n % 3 == 0)422 {423 if (Key3 == 0)424 {425 Delayms(5);426 if (Key3 == 0)427 while (!Key3);428 year++;429 if (year == 99)430 year = 0;431 }432 }433 434 }435 436 void main()437 {438 TMOD = 0x01;439 TH0 = 0x4c;440 //TH0 = (65536 - 10000) / 256;441 TL0 = 0x00;442 //TL0 = (65536 - 10000) % 256;443 EA = 1;444 ET0 = 1;445 TR0 = 1;446 while (1)447 {448 static uchar h = 0;449 if (Key4 == 0)450 {451 Delayms(5);452 if (Key4 == 0)453 while (!Key4);454 h++;455 }456 if (h % 2 == 1) //按Key4奇次数显示年月日457 {458 P1 = c[n % 3]; //年月日调位判断灯459 Dispaly2(year, month, day);460 Keyscan2();461 }462 if (h % 2 == 0) //按Key4偶次数显示时分秒463 {464 P1 = c[j % 3]; //时分秒调位判断灯465 Dispaly1(hour, minute, second);466 Keyscan1();467 }468 }469 }470 471 void time0_int(void) interrupt 1472 {473 //TH0 = (65536 - 10000) / 256;474 //TL0 = (65536 - 10000) % 256;475 TH0 = 0x4c; //公式：定时时间t = (2^16 - T0初值) * 振荡周期 * 12 （振荡周期 * 12 即机器周期）476 TL0 = 0x00; //T0 = 2^16 - t * 11059200 / 12 （此定时时间为 50ms， T1 = 19456 = 0x4c00）477 count++;478 if (count == 20)479 {480 count = 0;481 second++;482 if (second == 60)483 {484 second = 0;485 minute++;486 if (minute == 60)487 {488 minute = 0;489 hour++;490 if (hour == 24)491 {492 hour = 0;493 day++;494 if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) //是闰年495 {496 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)497 {498 if (day == 31)499 {500 day = 0;501 month++;502 if (month == 12)503 {504 month = 1;505 year++;506 if (year == 99)507 {508 year = 0;509 }510 }511 }512 }513 if ( month == 4 || month == 6 || month == 9 || month == 11 )514 {515 if (day == 30)516 {517 day = 0;518 month++;519 }520 }521 if (month == 2)522 {523 if (day == 28)524 {525 day = 0;526 month++;527 }528 }529 }530 else //不是闰年531 {532 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)533 {534 if (day == 31)535 {536 day = 0;537 month++;538 if (month == 12)539 {540 month = 1;541 year++;542 if (year == 99)543 {544 year = 0;545 }546 }547 }548 }549 if ( month == 4 || month == 6 || month == 9 || month == 11 )550 {551 if (day == 30)552 {553 day = 0;554 month++;555 }556 }557 if (month == 2)558 {559 if (day == 29)560 {561 day = 0;562 month++;563 }564 }565 566 }567 }568 }569 }570 }571 }
判断闰年算法：百度百科_闰年
非整百年：能被4整除的为闰年。（如2004年就是闰年,2100年不是闰年）；整百年：能被400整除的是闰年。(如2000年是闰年，1900年不是闰年)
((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0) 或year % 4 == 0 && year % 100 != 0 || year % 400 == 0
******************************************************************************
第一次更新，上面的没写星期显示，在此加上，部分算法有问题，已改
1 /************************************************** 2 3 作者：纟彖氵戋 博客：http://www.cnblogs.com/yllinux/ 4 5 时间：2017年6月9日 6 7 目标：利用单片机独立键盘、数码管、LED灯模块实现万年历（算法实现） 8 9 结果：默认显示 “ 星期 - 小时. 分钟. 秒 ” ；按Key4切换年月日显示 “ 年份. 月份. 日期 ” 10 按Key1停止计时，再按继续计时；按Key2切换要调的位同时LED灯给出位提示；按Key3调整的位加一；按Key4切换年月日显示和时分秒显示 11 12 缺点：延时运用了运算和松手检测运用了死等；代码有些烂。（有待改进） 13 ***************************************************/ 14 #include <reg52.h> 15 #define uchar unsigned char 16 #define uint unsigned int 17 18 uchar code a[] = { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x80,0x40 }; //字形码表0~9和.和- 19 uchar code b[] = { 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0xff }; //数码管位码表1~8和0 20 uchar code c[] = { 0x3f,0xf3,0xcf }; //调位指示灯位表 21 uchar const table_week[12]={0,3,3,6,1,4,6,2,5,0,3,5};//星期查找表 22 23 uint year = 2017; 24 uchar month = 6, day = 14; 25 uchar hour = 8, minute = 35, second = 0, ms_500 = 0; 26 uchar count; //时钟计数 27 uchar n = 1; //年月日调位指示 28 uchar j = 1; //时分秒调位指示 29 30 sbit Key1 = P3 ^ 0; //计时停止 31 sbit Key2 = P3 ^ 1; //调位 32 sbit Key3 = P3 ^ 2; //加一 33 sbit Key4 = P3 ^ 3; //切换 34 sbit LED1 = P1 ^ 0; 35 sbit we = P2 ^ 7; 36 sbit du = P2 ^ 6; 37 38 //延时函数 39 void Delayms(uint z) 40 { 41 uint x, y; 42 for (x = 0; x < z; x++) 43 for (y = 0; y < 114; y++); 44 } 45 46 //计算星期函数 47 uchar get_week(uint year,uchar month,uchar day) 48 { 49 uchar temp; 50 uchar yearH, yearL; 51 yearH = year/100; 52 yearL = year%100; 53 if (yearH > 19) yearL+=100; 54 temp = yearL + yearL / 4; 55 temp = temp % 7; 56 temp = temp + day + table_week[ month - 1 ]; 57 if (yearL % 4 == 0 && month < 3) temp--; 58 return(temp % 7); 59 } 60 61 62 //时分秒显示函数 63 void Dispaly1(uchar hour, uchar minute, uchar second) 64 { 65 P0 = b[8]; we = 1; we = 0; P0 = a[get_week(year, month, day)]; du = 1; du = 0; P0 = b[0]; we = 1; we = 0; Delayms(1); //数码管1 66 67 P0 = b[8]; we = 1; we = 0; P0 = a[11]; du = 1; du = 0; P0 = b[1]; we = 1; we = 0; Delayms(1); //数码管2 68 69 P0 = b[8]; we = 1; we = 0; P0 = a[hour / 10]; du = 1; du = 0; P0 = b[2]; we = 1; we = 0; Delayms(1); //数码管3 70 71 P0 = b[8]; we = 1; we = 0; P0 = a[hour % 10]; du = 1; du = 0; P0 = b[3]; we = 1; we = 0; Delayms(1); //数码管4 72 73 P0 = b[8]; we = 1; we = 0; P0 = a[10]; du = 1; du = 0; P0 = b[3]; we = 1; we = 0; Delayms(1); //数码管4小数点 74 75 P0 = b[8]; we = 1; we = 0; P0 = a[minute / 10]; du = 1; du = 0; P0 = b[4]; we = 1; we = 0; Delayms(1); //数码管5 76 77 P0 = b[8]; we = 1; we = 0; P0 = a[minute % 10]; du = 1; du = 0; P0 = b[5]; we = 1; we = 0; Delayms(1); //数码管6 78 79 P0 = b[8]; we = 1; we = 0; P0 = a[10]; du = 1; du = 0; P0 = b[5]; we = 1; we = 0; Delayms(1); //数码管6小数点 80 81 P0 = b[8]; we = 1; we = 0; P0 = a[second / 10]; du = 1; du = 0; P0 = b[6]; we = 1; we = 0; Delayms(1); //数码管7 82 83 P0 = b[8]; we = 1; we = 0; P0 = a[second % 10]; du = 1; du = 0; P0 = b[7]; we = 1; we = 0; Delayms(1); //数码管8 84 } 85 86 //年月日显示函数 87 void Dispaly2(uint year, uchar month, uchar day) 88 { 89 P0 = b[8]; we = 1; we = 0; P0 = a[year / 1000]; du = 1; du = 0; P0 = b[0]; we = 1; we = 0; Delayms(1);//数码管1 90 91 P0 = b[8]; we = 1; we = 0; P0 = a[(year % 1000) / 100]; du = 1; du = 0; P0 = b[1]; we = 1; we = 0; Delayms(1);//数码管2 92 93 P0 = b[8]; we = 1; we = 0; P0 = a[(year % 100) / 10]; du = 1; du = 0; P0 = b[2]; we = 1; we = 0; Delayms(1);//数码管3 94 95 P0 = b[8]; we = 1; we = 0; P0 = a[year % 10]; du = 1; du = 0; P0 = b[3]; we = 1; we = 0; Delayms(1);//数码管4 96 97 P0 = b[8]; we = 1; we = 0; P0 = a[10]; du = 1; du = 0; P0 = b[3]; we = 1; we = 0; Delayms(1);//数码管4小数点 98 99 P0 = b[8]; we = 1; we = 0; P0 = a[month / 10]; du = 1; du = 0; P0 = b[4]; we = 1; we = 0; Delayms(1);//数码管5100 101 P0 = b[8]; we = 1; we = 0; P0 = a[month % 10]; du = 1; du = 0; P0 = b[5]; we = 1; we = 0; Delayms(1);//数码管6 102 103 P0 = b[8]; we = 1; we = 0; P0 = a[10]; du = 1; du = 0; P0 = b[5]; we = 1; we = 0; Delayms(1);//数码管6小数点104 105 P0 = b[8]; we = 1; we = 0; P0 = a[day / 10]; du = 1; du = 0; P0 = b[6]; we = 1; we = 0; Delayms(1);//数码管7106 107 P0 = b[8]; we = 1; we = 0; P0 = a[day % 10]; du = 1; du = 0; P0 = b[7]; we = 1; we = 0; Delayms(1);//数码管8108 }109 110 void Keyscan1()111 {112 static uchar i = 0;113 if (Key1 == 0)114 {115 Delayms(5); //消抖 116 if (Key1 == 0)117 while (!Key1); //等待按键弹起118 i++;119 }120 if (i % 2 == 1)121 {122 //LED1 = 0;123 TR0 = 0;124 }125 if (i % 2 == 0)126 {127 //LED1 = 1;128 TR0 = 1;129 }130 if (Key2 == 0)131 {132 Delayms(5);133 if (Key2 == 0)134 while (!Key2);135 j++;136 if (j == 3)137 j = 0;138 }139 if (j % 3 == 1)140 {141 if (Key3 == 0)142 {143 Delayms(5);144 if (Key3 == 0)145 while (!Key3);146 second++;147 if (second == 60)148 second = 0;149 }150 }151 if (j % 3 == 2)152 {153 if (Key3 == 0)154 {155 Delayms(5);156 if (Key3 == 0)157 while (!Key3);158 minute++;159 if (minute == 60)160 minute = 0;161 }162 }163 if (j % 3 == 0)164 {165 if (Key3 == 0)166 {167 Delayms(5);168 if (Key3 == 0)169 while (!Key3);170 hour++;171 if (hour == 24)172 hour = 0;173 }174 }175 }176 177 void Keyscan2()178 {179 static uchar m = 0;180 if (Key1 == 0)181 {182 Delayms(5);183 if (Key1 == 0)184 while (!Key3);185 m++;186 if (m == 3)187 m = 0;188 }189 if (m % 2 == 1)190 {191 //LED1 = 0;192 TR0 = 0;193 }194 if (m % 2 == 0)195 {196 //LED1 = 1;197 TR0 = 1;198 }199 if (Key2 == 0)200 {201 Delayms(5);202 if (Key2 == 0)203 while (!Key2);204 n++;205 }206 if (n % 3 == 1)207 {208 if (Key3 == 0)209 {210 Delayms(5);211 if (Key3 == 0)212 while (!Key3);213 day++;214 if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) //是闰年215 {216 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)217 {218 if (day == 32)219 {220 day = 0;221 }222 }223 if ( month == 4 || month == 6 || month == 9 || month == 11 )224 {225 if (day == 31)226 {227 day = 0;228 }229 }230 if (month == 2)231 {232 if (day == 30)233 {234 day = 0;235 }236 }237 } 238 else //不是闰年239 {240 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)241 {242 if (day == 32)243 {244 day = 0;245 }246 }247 if ( month == 4 || month == 6 || month == 9 || month == 11 )248 {249 if (day == 31)250 {251 day = 0;252 }253 }254 if (month == 2)255 {256 if (day == 29)257 {258 day = 0;259 }260 }261 }262 263 }264 }265 if (n % 3 == 2)266 {267 if (Key3 == 0)268 {269 Delayms(5);270 if (Key3 == 0)271 while (!Key3);272 month++;273 if (month == 12)274 month = 0;275 }276 }277 if (n % 3 == 0)278 {279 if (Key3 == 0)280 {281 Delayms(5);282 if (Key3 == 0)283 while (!Key3);284 year++;285 if (year == 2101)286 year = 2000;287 }288 }289 290 }291 292 void main()293 {294 TMOD = 0x01;295 TH0 = 0x4c;296 TL0 = 0x00;297 EA = 1;298 ET0 = 1;299 TR0 = 1;300 while (1)301 {302 static uchar h = 0;303 if (Key4 == 0)304 {305 Delayms(5);306 if (Key4 == 0)307 while (!Key4);308 h++;309 }310 if (h % 2 == 1) //按Key4奇次数显示年月日311 {312 P1 = c[n % 3]; //年月日调位判断灯313 Dispaly2(year, month, day);314 Keyscan2();315 }316 if (h % 2 == 0) //按Key4偶次数显示时分秒317 {318 P1 = c[j % 3]; //时分秒调位判断灯319 Dispaly1(hour, minute, second);320 Keyscan1();321 get_week( year, month, day);322 }323 }324 }325 326 void time0_int(void) interrupt 1327 {328 TH0 = 0x4c; //公式：定时时间t = (2^16 - T0初值) * 振荡周期 * 12 （振荡周期 * 12 即机器周期）329 TL0 = 0x00; //T0 = 2^16 - t * 11059200 / 12 （此定时时间为 50ms， T1 = 19456 = 0x4c00）330 count++;331 if (count == 10)332 {333 count = 0;334 ms_500++;335 if (ms_500 == 2)336 {337 ms_500 = 0;338 second++;339 if (second == 60)340 {341 second = 0;342 minute++;343 if (minute == 60)344 {345 minute = 0;346 hour++;347 if (hour == 24)348 {349 hour = 0;350 day++;351 if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) //是闰年352 {353 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)354 {355 if (day == 31)356 {357 day = 0;358 month++;359 if (month == 12)360 {361 month = 1;362 year++;363 if (year == 2101)364 {365 year = 2000;366 }367 }368 }369 }370 if ( month == 4 || month == 6 || month == 9 || month == 11 )371 {372 if (day == 30)373 {374 day = 0;375 month++;376 }377 }378 if (month == 2)379 {380 if (day == 29)381 {382 day = 0;383 month++;384 }385 }386 }387 else //不是闰年388 {389 if (month == 12 || month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10)390 {391 if (day == 31)392 {393 day = 0;394 month++;395 if (month == 12)396 {397 month = 1;398 year++;399 if (year == 2101)400 {401 year = 2000;402 }403 }404 }405 }406 if ( month == 4 || month == 6 || month == 9 || month == 11 )407 {408 if (day == 30)409 {410 day = 0;411 month++;412 }413 }414 if (month == 2)415 {416 if (day == 28)417 {418 day = 0;419 month++;420 }421 }422 423 }424 }425 }426 }427 }428 }429 }
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星期算法：
（1）
https://zhidao.baidu.com/question/583599630029584485.html?fr=ala&word=%E6%98%9F%E6%9C%9F%E7%9A%84%E7%AE%97%E6%B3%95&device=mobile&ssid=0&from=1019023i&uid=0&pu=usm@1,sz@320_1001,ta@iphone_2_6.0_3_537&bd_page_type=1&baiduid=4B6600AA4F62F7DC2B062BEF81794A25&tj=zhidao_2_0_10_l1
https://zhidao.baidu.com/question/159474320.html
1 uchar const table_week[12]={0,3,3,6,1,4,6,2,5,0,3,5};//平年月表 2 uchar get_week(uint year,uchar month,uchar day) 3 { 4 uchar temp; 5 uchar yearH, yearL; 6 yearH = year / 100; 7 yearL = year % 100; 8 if (yearH > 19) 9 yearL += 100;10 temp = yearL + yearL / 4;11 temp = temp % 7;12 temp = temp + day + table_week[month - 1];13 if (yearL % 4 == 0 && month < 3)14 temp--;15 return(temp % 7);16 }
（2）
蔡勒公式法：百度百科_蔡勒公式
http://blog.csdn.net/minyuanxiani/article/details/22890447#
1 /* 2 ********************************************************************************************************* 3 * 函 数 名: bsp_CalcWeek 4 * 功能说明: 根据日期计算星期几 5 * 形 参: _year _mon _day 年月日 (年是2字节整数，月和日是字节整数） 6 * 返 回 值: 周几 （1-7） 7表示周日 7 ********************************************************************************************************* 8 */ 9 uint8_t bsp_CalcWeek(uint16_t _year, uint8_t _mon, uint8_t _day) 10 { 11 /* 12 蔡勒（Zeller）公式 13 历史上的某一天是星期几？未来的某一天是星期几？关于这个问题，有很多计算公式（两个通用计算公式和 14 一些分段计算公式），其中最著名的是蔡勒（Zeller）公式。 15 即w=y+[y/4]+[c/4]-2c+[26(m+1)/10]+d-1 16 17 公式中的符号含义如下， 18 w：星期； 19 c：年的高2位，即世纪-1 20 y：年（两位数）； 21 m：月（m大于等于3，小于等于14，即在蔡勒公式中，某年的1、2月要看作上一年的13、14月来计算， 22 比如2003年1月1日要看作2002年的13月1日来计算）； 23 d：日； 24 [ ]代表取整，即只要整数部分。 25 26 算出来的W除以7，余数是几就是星期几。如果余数是0，则为星期日。 27 如果结果是负数，负数求余数则需要特殊处理： 28 负数不能按习惯的余数的概念求余数，只能按数论中的余数的定义求余。为了方便 29 计算，我们可以给它加上一个7的整数倍，使它变为一个正数，然后再求余数 30 31 以2049年10月1日（100周年国庆）为例，用蔡勒（Zeller）公式进行计算，过程如下： 32 蔡勒（Zeller）公式：w=y+[y/4]+[c/4]-2c+[26(m+1)/10]+d-1 33 =49+[49/4]+[20/4]-2×20+[26× (10+1)/10]+1-1 34 =49+[12.25]+5-40+[28.6] 35 =49+12+5-40+28 36 =54 (除以7余5) 37 即2049年10月1日（100周年国庆）是星期5。 38 */ 39 uint8_t y, c, m, d; 40 int16_t w; 41 42 if (_mon >= 3) 43 { 44 m = _mon; 45 y = _year % 100; 46 c = _year / 100; 47 d = _day; 48 } 49 else /* 某年的1、2月要看作上一年的13、14月来计算 */ 50 { 51 m = _mon + 12; 52 y = (_year - 1) % 100; 53 c = (_year - 1) / 100; 54 d = _day; 55 } 56 57 w = y + y / 4 + c / 4 - 2 * c + ((uint16_t)26*(m+1))/10 + d - 1; 58 if (w == 0) 59 { 60 w = 7; /* 表示周日 */ 61 } 62 else if (w < 0) /* 如果w是负数，则计算余数方式不同 */ 63 { 64 w = 7 - (-w) % 7; 65 } 66 else 67 { 68 w = w % 7; 69 } 70 return w; 71 }
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参考：
http://www.cnblogs.com/LXSYD-C/p/6364888.html
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