#include <stdio.h>
 
int main()
{
   int   invalid_operator = 0;
   char  operator1;
   float number1, number2, result;
 
   printf( "Enter two numbers and an operator in the format\n" );
   printf( "number1 operator number2\n" );
   scanf( "%f %c %f", &number1, &operator1, &number2 );
 
   switch ( operator1 ) {
      case '*' :
         result = number1 * number2;
         break;
      case '/' : 
         result = number1 / number2; 
         break;
      case '+' :
         result = number1 + number2; 
         break;
      case '-' :
         result = number1 - number2; 
         break;
      default :
         invalid_operator = 1;
   }
 
   switch ( invalid_operator ) {
      case 1 :
         printf( "Invalid operator.\n" ); 
         break;
      default :
         printf( "%f %c %f is %f\n",
            number1, operator1, number2, result );
   }
 
   return 0;
}

int number = 97; //97 is the ascii value of 'a' 
char character = (char)number; // "convert" it
printf("%c", character);