#include<stdio.h>
int main(void)
{
    int data1=0,data2=0;
    char op='a';
    printf("Please enter an expression:");
    scanf("%d %c %d",&data1,&op,&data2);
    switch(op)
    {
        case'+':
        printf("%d+%d=%d\n",data1,data2,data1+data2);
        break;
        case'-':
        printf("%d-%d=%d\n",data1,data2,data1-data2);
        break;
        case'*':
        printf("%d*%d=%d\n",data1,data2,data1*data2);
        break;
        case'/':
        if(data2==0)
          printf("Division by zero!\n");
        else
          printf("%d/%d=%d\n",data1,data2,data1/data2);
        break;
    default:
      printf("Invalid operator!\n");
    }
    return 0;
}