在日期上加n天

#include <time.h>#include <stdio.h>#include <sys/types.h>#include <sys/timeb.h>#include <string.h>int main(){struct tm tm1;tm1.tm_mon=10-1;tm1.tm_mday=24;tm1.tm_year=1994-1900;tm1.tm_hour=tm1.tm_min=tm1.tm_sec=0;tm1.tm_isdst=-1;printf("%d/%d/%d\n",tm1.tm_mon,tm1.tm_mday,tm1.tm_year);tm1.tm_mday+=90;if(mktime(&tm1)==-1){fprintf(stderr,"mktime failed \n");}else{printf("%d/%d/%d\n",tm1.tm_mon+1,tm1.tm_mday,tm1.tm_year+1900);}}

Output

9/24/94
1/22/1995