编写程序，输入一位学生的生日；输出该生的实际年龄。

#include<dos.h>
#include<stdio.h>
#include<math.h>
main()
{ int birthy;
int birthm;
int ny;
int nm;
struct date now;
getdate(&now);
printf("inputbirth: year");
scanf("%d",&birthy);
printf("inputbirth: mon");
scanf("%d",&birthm);
if (now.da_mon<birthm)
{nm=now.da_mon+12-birthm;
ny=now.da_year-1-birthy;}
else{nm=now.da_mon-birthm;
ny=now.da_year-birthy;}
printf("%dyear,%dmon",ny,nm);

}
如果你有兴趣的话,还可以计算到天.

#include"stdio.h"
main()
{
int y0,m0,d0,y1,m1,d1,y,m,d;
k:printf("请输入出生日期：");
scanf("%d,%d,%d",&y0,&m0,&d0);
printf("请输入当前日期：");
scanf("%d,%d,%d",&y1,&m1,&d1);
y=y1-y0;
m=m1-m0;
d=d1-d0;
if(d<0)d+=30,m--;
if(m<0)m+=12,