Write a program that calculate simple calculation by function

INPUT:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

#include<stdio.h> int sum(int a, int b) { return (a + b); } int main() { int a, b; char op; printf("Enter two integer and one operator(+,-,*,/):\t"); scanf("%d %d %c", &a, &b, &op); switch(op) { case'+': printf("%d + %d = %d", a, b, a+b); break; case'-': printf("%d - %d = %d", a, b, a-b); break; case'*': printf("%d * %d = %d", a, b, a*b); break; case'/': printf("%d / %d = %d", a, b, a/b); break; default: printf("Incorrect Output."); }//switch }//main()

OutPut:

Enter two integer and one operator(+,-,*,/): 15 3 /
15 / 3 = 5