编辑代码

#include <stdio.h>
int Prime(int s){
    int a = 1;
    int k;
    float g, r;
    for(k=2;k<s;k++){
        g = k / s;
        r = g;
        (int)g;
        if (r == g){
            a = 0;
            break;
        }
    }
    return a;
}
int main(){
    int a;
    char b;
    b = input("Input a Number\n");
    a = scanf("%d",b);
    case Prime(a)
        switch (0) printf("Not a Prime");break;
        switch (1) printf("Prime");break;
        default:printf("Has an ERROR");
    }