/*将一个数字字符串转换成这个字符串对应的数字（包括正浮点数、负浮点数）例如：“12.34“ 返回12.34“-123.34“ 返回-123.34函数原型：double my_atof(char *str)*/#include<stdio.h>#include<math.h>double my_atof(char *str){double res = 0.0; //结果int count = 0;int i = 0;int j = 0;if (str[0] == '-'){for (i = 1; str[i] != '\0' && str[i] != '.'; i++){res = res * 10 + (str[i] – '0');}i++;for (j = i, count = 1; str[j] != '\0'; j++, count++){res = res + (str[j] – '0') * pow(0.1,count);}return (0 – res);}else{for (i = 0; str[i] != '\0' && str[i] != '.'; i++){res = res * 10 + (str[i] – '0');}i++;for (j = i, count = 1; str[j] != '\0'; j++, count++){res = res + (str[j] – '0') * pow(0.1, count);}return (res);}}int main(void){char *str_1 = "-8.12";//测试char *str_2 = "365.46";//测试printf("转换后的数为：%f\n", my_atof(str_1));printf("转换后的数为：%f\n", my_atof(str_2));return 0;}
，孤独是为了孤独背后的解脱，孤独的过程，就是一个寻找真爱的过程。
