#include<stdio.h>
#include<math.h>
int main()
{
    int num1,num2;
    char aa;
    printf("enter num1\n");
        scanf("%d",&num1);

      printf("enter operator\n");
        scanf("\n%c",&aa);
    
    printf("enter num2\n");
        scanf("%d",&num2);

    if(aa=='+'){
        printf("%d",num1+num2);
    }
            else if(aa=='-'){
        printf("%d",num1-num2);
            }
    else if (aa=='*'){
        printf("%d",num1*num2);
    }
    else if(aa=='/'){
        printf("%d",num1/num2);
    }
    else{
        printf(" invald operator");
    }
    
}