用函数计算每个月的天数,C语言问题,必须是先设计一个函数我这个哪里错了?#include #includeint main(void){ int f(int x,int y);int year ,month,day,t;printf("输入年月日：");scanf("%d%d%d",&year,&month,&day);t==f(year,mon

用函数计算每个月的天数,C语言问题,必须是先设计一个函数我这个哪里错了?#include #includeint main(void){ int f(int x,int y);int year ,month,day,t;printf("输入年月日：");scanf("%d%d%d",&year,&month,&day);t==f(year,mon
用函数计算每个月的天数,C语言问题,必须是先设计一个函数

我这个哪里错了?
#include
#include
int main(void)
{ int f(int x,int y);
int year ,month,day,t;
printf("输入年月日：");
scanf("%d%d%d",&year,&month,&day);
t==f(year,month);
printf("%d\n",t);
getch();
}
int f(int x,int y)
{ int z;
switch(y)
{case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
z=31;
break;
case 4:
case 6:
case 9:
case 11:
z=30;
break;
case 2:
if (x%4=0&&x%100!=0||x%400=0)
z=29;
else
z=28;
break;
}
return(z);
}

用函数计算每个月的天数,C语言问题,必须是先设计一个函数我这个哪里错了?#include #includeint main(void){ int f(int x,int y);int year ,month,day,t;printf("输入年月日：");scanf("%d%d%d",&year,&month,&day);t==f(year,mon
scanf("%d%d%d",&year,&month,&day);      //这里不好区分年月日吧,分三行写吧.
t==f(year,month);       //==应该为=
if (x%4=0&&x%100!=0||x%400=0)      //=应该为==
改了这3处你再试试.
#include <cstdlib>
#include <iostream>
using namespace std;
int days(int year,int month)
{
    switch (month)
    {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
             return 31;
             break;
        case 2:
             if(year%400==0 ||(year%100!=0 && year%4==0))
             return 29;
             else 
             return 28;
             break;
        case 4:
        case 6:
        case 9:
        case 11:
             return 30;
             break; 
        default:
             return 0;
             break;
    }       
} 
int main(int argc, char *argv[])
{
    int year,month,day;
   printf("输入年份：\n");
   scanf("%d",&year); 
   printf("输入月份：\n");
   scanf("%d",&month);
   day=days(year,month);
   printf("%d年%d月有%d天.\n",year,month,day); 
   
    system("PAUSE");
    return EXIT_SUCCESS;
}