#include
int main(void)
{
int a, b;
char ch;
printf("Do you want to (Choose the first letter):\n");
printf("(A)dd, (S)ubtract, (M)ultiply, or (D)ivide?\n");
do {
printf("Choice: ");
ch = getchar();
} while(ch!='A' && ch!='S' && ch!='M' && ch!='D');
printf("\n");
printf("Enter first number: ");
scanf("%d", &a);
printf("Enter second number: ");
scanf("%d", &b);
if(ch=='A')
printf("%d", a + b);
else if(ch=='S')
printf("%d", a - b);
else if(ch=='M')
printf("%d", a * b);
else if(ch=='D' && b!=0)
printf("%d", a / b);
return 0;
}