#include <stdio.h>
#include <stdlib.h>

int main( void )
{
  int op1;
  int op2;
  char awp[2];
  double answer;

  printf("5 Function Calculator: \n\n");
  printf(" Add\n Subtract\n Multiply\n");
  printf(" Divide\n Modulus\n\n");
  printf("Enter first integer: ");
  scanf("%d", &op1);
  printf("\n");
  printf("Enter an operator (*,/,+,-,%%): ");
  scanf ("%s", &awp);
  printf("\n");
  printf("Enter the second integer: ");
  scanf("%d", &op2);
  printf("\n");

  if(!strcmp("*",awp)) {
    answer = (op1 * op2);
  } else 
  if(!strcmp("/",awp)) {
    answer = (op1 / op2);
  } else
  if(!strcmp("+",awp)) {
    answer = (op1 + op2);
  } else
  if(!strcmp("-",awp)) {
    answer = (op1 - op2);
  } else
  if(!strcmp("%",awp)) {
    answer = (op1 % op2);
  }
  
  printf("Answer: %d\n", answer);
}