정올 580 : 함수2-자가진단2

My Solution

#include<stdio.h>
int cmp(int mon,int day){
    switch(mon){
        case 1: case 3: case 5: case 7: case 8: case 10: case 12:
            if(day<=31&&day>0){
                return 1;
            }
            else{
                return 0;
            }
        case 2:
            if(day<=29&&day>0){
                return 1;
            }
            else{
                return 0;
            }
        default:
            if(day<=30&&day>0){
                return 1;
            }
            else{
                return 0;
            }
    }
    
}
int main(void){
    int mon,day;
    scanf("%d %d",&mon,&day);
    cmp(mon,day);
    if(cmp(mon,day)==1){
        printf("OK!");
    }
    else{
        printf("BAD!");
    }
    return 0;
}