字符查找函数strchr
char *mystrchr(const char *str, const char c){char *p = NULL;for (char*newp = str; *newp != '\0'; newp++){if (*newp==c){p = newp;//一个一个的查找break;}}return p;}char *mystrchrdg(const char *str, const char c){if (*str!='\0'){return NULL;}else{if (*str==c){return str;//返回指针}mystrchrdg(++str, c);//循环区域终止}}//mystrchrvoid main(){char *pstr1 = mystrchr("zrf is rocket", 'z');char *pstr2 = <span style="font-family: Arial, Helvetica, sans-serif;">mystrchrdg</span>("zrf is rocket", 'A');printf("pstr2=%s\n", pstr2);if (pstr1 == NULL){printf("can not find");}else{printf("can find %p 存在此字符：%c\n", pstr1, *pstr1);}system("pause");}
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