C++ Switch Statement

In C++, the switch statement is used to perform different actions based on the value of a variable. It is cleaner than multiple if...else statements.

Syntax:

switch (variable) {
    case value1:
        // code
        break;
    case value2:
        // code
        break;
    default:
        // code
}

Example 1: Day of the Week

#include <iostream>
using namespace std;

int main() {
    int day = 3;
    switch(day) {
        case 1: cout << "Monday"; break;
        case 2: cout << "Tuesday"; break;
        case 3: cout << "Wednesday"; break;
        default: cout << "Invalid day";
    }
    return 0;
}

Prints the day name based on the number provided.

Output: Wednesday

Example 2: Grade Evaluation

#include <iostream>
using namespace std;

int main() {
    char grade = 'B';
    switch(grade) {
        case 'A': cout << "Excellent"; break;
        case 'B': cout << "Good"; break;
        case 'C': cout << "Average"; break;
        default: cout << "Fail";
    }
    return 0;
}

Checks student's grade and prints performance.

Output: Good

Example 3: Simple Calculator

#include <iostream>
using namespace std;

int main() {
    char op = '+';
    int a = 5, b = 3;
    switch(op) {
        case '+': cout << (a + b); break;
        case '-': cout << (a - b); break;
        case '*': cout << (a * b); break;
        case '/': cout << (a / b); break;
        default: cout << "Invalid operator";
    }
    return 0;
}

Performs calculation based on the operator.

Output: 8

Example 4: Vowel Checker

#include <iostream>
using namespace std;

int main() {
    char ch = 'e';
    switch(ch) {
        case 'a': case 'e': case 'i': case 'o': case 'u':
            cout << "Vowel";
            break;
        default:
            cout << "Consonant";
    }
    return 0;
}

Checks if a character is a vowel.

Output: Vowel

Example 5: Traffic Light System

#include <iostream>
using namespace std;

int main() {
    char light = 'R';
    switch(light) {
        case 'R': cout << "Stop"; break;
        case 'Y': cout << "Ready"; break;
        case 'G': cout << "Go"; break;
        default: cout << "Invalid Signal";
    }
    return 0;
}

Shows traffic action based on light color.

Output: Stop

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