c语言怎么求两个日期相差的秒数,日期格式20140325150630和20140...答:include <stdio.h> include int main(void){ struct tm time_cha;time_t t1,t2;long int d;int year, month, day,hour,min,sec;scanf("%4d%2d%2d%2d%2d%2d",&year,&month,&day,&hour,&min,&sec);time_cha.tm_year = year - 1900; //tm结构记录年为实际-1900 time_cha.tm_...