C Decision Making - Branching
Sample Program (switch-case)
#include ' stdio.h ' //include stdio.h header file to your program
main ( ) //start of the main function
{
int num1, num2, result; //Declaration of variables
char operator;
printf (“Enter two numbers”); //Message to the user to enter 2 numbers
scanf (“%dy.d”, & num1, &num2); //read and store the numbers.
printf (“Enter an operator”); //message to the user to enter an //operator
Scanf (“%c”, & operator); //read and store the operator
Switch (operator) //start of the switch construct
{
case ‘+’ :
result = num1 + num2; //If the operator entered is ‘t’
break; //add the 2 numbers & store it in result
case ‘-‘:
result = num1 – num2; //If the operator entered is ‘-‘
break;// subtract the numbers & store
case ‘*’:
result = num1 * num2;// it i n the result
break; //If the operator enter is (*)
case ‘/’:
if (num2! = 0)// multiply the 2 numbers & show it in //result
result = num1 / num2; // if the operator is ‘/’ then
else // check for division by zero if the second number is zero
{
printf (“warning : division by zero \ n”);
result = 0:
}
break;
default:
printf (“\n unknown operator”) //If the operator entered
result = 0// is none of the 4 operators print message
break;// set the result value to zero.
Printf (“%d”, result); //print the result.
}
