main()
{
int y,m,d,days=0,i;
printf("please input date:");
scanf("%d%d%d",&y,&m,&d);
for(i=1;i<=m-1;i++)
{
switch(i)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: days=days+31; break;
case 4:
case 6:
case 9:
case 11: days=days+30; break;
case 2:
if(y%4==0 && y%100!=0 | y%400==0)
days=days+29;
else
days=days+28;
}
}
days=days+d;
printf("%d",days);
}。
问：挺简单的一C函数，不过我是初学者，暂时还不会写，请好心人多多帮忙！
答：int mystrlen(char *str) { int n = 0; while (*str) { n++; str++;} return n; } voi...详情>>
