Examples of Switch Case in C++

February 15, 2023

Switch Case Statement

Switch case is used for control statements which decides the execution of statements rather than if-else statements. In other word, Switch Case is utilized when there are several cases and each requires a different task to be completed.

context switching in operating system

Examples of Switch Case statement in C++

Syntax:

switch(expression)
{
case 1:
      statement(s);
break;
case 2:
      statement(s);
break;
default:
      statement(s);
}

Problem 1:

Write a Program using switch case for performing operation on following conditions.

  • If operator is ‘+’, then print addition of given integer.
  • If operator is ‘-‘, then print subtraction of given integer.
  • If operator is ‘*’, then print multiplication of given integer.
  • If operator is ‘%’, then print division of given integer.
Run 
#include<iostream>
using namespace std;
int main()
{
  int num1, num2;
  char op;
  cout << "Enter two numbers and an operator (+, -, *, %): "; cin >> num1 >> num2 >> op;
  switch (op)
    {
    case '+':
      cout << num1 << " + " << num2 << " = " << num1 + num2;
      break;
    case '-':
      cout << num1 << " - " << num2 << " = " << num1 - num2;
      break;
    case '*':
      cout << num1 << " * " << num2 << " = " << num1 * num2;
      break;
    case '%':
      cout << num1 << " % " << num2 << " = " << num1 % num2;
      break;
    default:
      cout << "Invalid operator";
    }
  return 0;
}

Output

Enter two numbers and an operator (+, -, *, %): 11 13 *  
11 * 13 = 143

Problem 2:

Write a program using switch case to check the CGPA on given condition.

  • If the CGPA is 8 then print You got 8 CGPA.
  • If the CGPA is 10 then print You got 10 CGPA.
  • If the CGPA is 7 then print You got 7 CGPA.
Run 
#include<iostream> 
using namespace std;
int main() {
    double cgpa;
    cout << "Enter your CGPA: "; cin >> cgpa;
    switch ((int)cgpa) {
        case 8:
            cout << "You got 8 CGPA.";
            break;
        case 7:
            cout << "You got 7 CGPA.";
            break;
        case 10:
            cout << "You got 10 CGPA.";
            break;
        default:
            cout << "Invalid CGPA";
    }
    return 0;
}

Output

Enter your CGPA: 10
You got 10 CGPA.

C++ Decision Making

C++ Loop Types

C++ for Loop

String in C++

Function in C++

Problem 3:

Write a program using switch case for printing that you are eligible for voting or not.

  • If age is equal to 18 then you are not eligible for voting.
  • If age is equal to 20 then you are eligible for voting.
Run 
#include<iostream>
using namespace std;
int main() {
    int age;
    cout << "Enter your age: "; cin >> age;
    switch (age) {
        case 18:
            cout << "You are not eligible for voting.";
            break;
        case 20:
            cout << "You are eligible for voting.";
            break;
        default:
            if (age < 18) {
                cout << "You are not eligible for voting.";
            } else {
                cout << "You are eligible for voting.";
            }
    }

    return 0;
}

Output

Enter your age: 21
You are eligible for voting.

Problem 4:

Write a program to print the month name by given number.

Run 
#include<iostream>
using namespace std;
int main() {
    int monthNum;
    cout << "Enter the number of the month (1-12): "; cin >> monthNum;
    switch (monthNum) {
        case 1:
            cout << "January";
            break;
        case 2:
            cout << "February";
            break;
        case 3:
            cout << "March";
            break;
        case 4:
            cout << "April";
            break;
        case 5:
            cout << "May";
            break;
        case 6:
            cout << "June";
            break;
        case 7:
            cout << "July";
            break;
        case 8:
            cout << "August";
            break;
        case 9:
            cout << "September";
            break;
        case 10:
            cout << "October";
            break;
        case 11:
            cout << "November";
            break;
        case 12:
            cout << "December";
            break;
        default:
            cout << "Invalid month number";
    }

    return 0;
}

Output

Enter the number of the month (1-12): 6
June

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