7A02.c

#include<stdio.h>
void main()
{
    int a;
    printf("Enter value of a =      ");
    scanf("%d",&a);
    switch (a)
    {
    case 1:
        printf("31");
        break;
    case 2:
        printf("28");
        break;
    case 3:
        printf("31");
        break;
    case 4:
        printf("30");
        break;
    case 5:
        printf("31");
        break;
    case 6:
        printf("30");
        break;
    case 7:
        printf("31");
        break;
    case 8:
        printf("31");
        break;
    case 9:
        printf("30");
        break;
    case 10:
        printf("31");
        break;
    case 11:
        printf("30");
        break;
    case 12:
        printf("31");
        break;

    
    default:
        printf("Wrong month number");
        break;
    }
}