Multiple conditions for if statement in C / C++ Switch...case statement in C / C++ with example
In this tutorial, we will learn about the switch...case statement in C / C++ and its working with the help of some examples. This is one of the basic knowledge in C / C++ programming language, so please learn it carefully.
Top 10 switch...case in C / C++ with examples
Here, we will implement examples using switch...case in C / C++ from basic to advanced. For each example, we will implement with two different languages C and C++.
Example 1: Create a Calculator using the switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
char oper;
float num1, num2;
cout << "Enter an operator (+, -, *, /): ";
cin >> oper;
cout << "Enter two numbers: " << endl;
cin >> num1 >> num2;
switch (oper) {
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:
// operator is doesn't match any case constant (+, -, *, /)
cout << "Error! The operator is not correct";
break;
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
char oper;
float num1, num2;
printf("Enter an operator (+, -, *, /): ");
scanf("%c", &oper);
printf("Enter two numbers: \n");
scanf("%f%f",&num1,&num2);
switch (oper) {
case '+':
printf("%f + %f = %f",num1,num2,num1+num2);
break;
case '-':
printf("%f - %f = %f",num1,num2,num1-num2);
break;
case '*':
printf("%f * %f = %f",num1,num2,num1*num2);
break;
case '/':
printf("%f / %f = %f",num1,num2,num1/num2);
break;
default:
// operator is doesn't match any case constant (+, -, *, /)
printf("Error! The operator is not correct");
break;
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 2: Check if the key pressed down is a number with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
char ch;
cout<<"Enter any key: ";
cin>>ch;
switch(ch){
case '0':
cout<<"This is number 0.";
break;
case '1':
cout<<"This is number 1.";
break;
case '2':
cout<<"This is number 2.";
break;
case '3':
cout<<"This is number 3.";
break;
case '4':
cout<<"This is number 4.";
break;
case '5':
cout<<"This is number 5.";
break;
case '6':
cout<<"This is number 6.";
break;
case '7':
cout<<"This is number 7.";
break;
case '8':
cout<<"This is number 8.";
break;
case '9':
cout<<"This is number 9.";
break;
default:
cout<<"This is not a number.";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
char ch;
printf("Enter any key: ");
scanf("%c", &ch);
switch(ch){
case '0':
printf("This is number 0.");
break;
case '1':
printf("This is number 1.");
break;
case '2':
printf("This is number 2.");
break;
case '3':
printf("This is number 3.");
break;
case '4':
printf("This is number 4.");
break;
case '5':
printf("This is number 5.");
break;
case '6':
printf("This is number 6.");
break;
case '7':
printf("This is number 7.");
break;
case '8':
printf("This is number 8.");
break;
case '9':
printf("This is number 9.");
break;
default:
printf("This is not a number.");
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 3: Program to answer multiple-choice questions with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
char ch;
cout<<"Question: 10 / 2 = ?\n";
cout<<"a. 5\n";
cout<<"a. 6\n";
cout<<"a. 7\n";
cout<<"a. 8\n";
cout<<"Enter your answer: ";
cin>>ch;
switch(ch){
case 'a':
cout<<"Congratulations you made the right choice!";
break;
case 'b':
cout<<"Sorry, you gave the wrong answer!";
break;
case 'c':
cout<<"Sorry, you gave the wrong answer!";
break;
case 'd':
cout<<"Sorry, you gave the wrong answer!";
break;
default:
cout<<"The answer is not appropriate.";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
char ch;
printf("Question: 10 / 2 = ?\n");
printf("a. 5\n");
printf("a. 6\n");
printf("a. 7\n");
printf("a. 8\n");
printf("Enter your answer: ");
scanf("%c", &ch);
switch(ch){
case 'a':
printf("Congratulations you made the right choice!");
break;
case 'b':
printf("Sorry, you gave the wrong answer!");
break;
case 'c':
printf("Sorry, you gave the wrong answer!");
break;
case 'd':
printf("Sorry, you gave the wrong answer!");
break;
default:
printf("The answer is not appropriate.");
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 4: Check if a number is divisible by 3 with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int mod, n;
cout<<"Enter a number: ";
cin>>n;
mod = n % 3;
switch(mod){
case 0:
cout<<n<<" is a number divisible by 3";
break;
default:
cout<<n<<" is not a number divisible by 3";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int mod, n;
printf("Enter a number: ");
scanf("%d", &n);
mod = n % 3;
switch(mod){
case 0:
printf("%d is a number divisible by 3", n);
break;
default:
printf("%d is not a number divisible by 3",n);
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 5: The program prints out the days of the week with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int number;
int n;
cout<<"Enter number n: ";
cin>>n;
switch(n){
case 2:
cout<<"This is Monday!";
break;
case 3:
cout<<"This is Tuesday!";
break;
case 4:
cout<<"This is Wednesday!";
break;
case 5:
cout<<"This is Thursday!";
break;
case 6:
cout<<"This is Friday!";
break;
case 7:
cout<<"This is Saturday!";
break;
case 8:
cout<<"This is Sunday!";
break;
default:
cout<<"It's not exist!";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int number;
int n;
printf("Enter number n: ");
scanf("%d", &n);
switch(n){
case 2:
printf("This is Monday!");
break;
case 3:
printf("This is Tuesday!");
break;
case 4:
printf("This is Wednesday!");
break;
case 5:
printf("This is Thursday!";
break;
case 6:
printf("This is Friday!");
break;
case 7:
printf("This is Saturday!");
break;
case 8:
printf("This is Sunday!");
break;
default:
printf("It's not exist!");
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 6: Program for grading student learning scores 'A', 'B','C' with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int number;
char ch;
cout<<"Enter your score: ";
cin>>ch;
switch(ch){
case 'A':
cout<<"Excellent!";
break;
case 'B':
cout<<"Good!";
break;
case 'C':
cout<<"Medium!";
break;
default:
cout<<"Invalid score!";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int number;
char ch;
printf("Enter your score: ");
scanf("%c", &ch);
switch(ch){
case 'A':
printf("Excellent!");
break;
case 'B':
printf("Good!");
break;
case 'C':
printf("Medium!");
break;
default:
printf("Invalid score!");
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 7: Check even and odd numbers with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int number, result;
cout<<"Enter a number: ";
cin>>number;
result = number % 2;
switch(result){
case 0:
cout<<"This is a even number.";
break;
case 1:
cout<<"This is a odd number.";
break;
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int number, result;
printf("Enter a number: ");
scanf("%d", &number);
result = number % 2;
switch(result){
case 0:
printf("This is a even number.");
break;
case 1:
printf("This is a odd number.");
break;
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 8: Create menus with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
int main() {
int number;
cout<<"-------------Menu-------------\n\n";
cout<<"\t1. Option 1.\n";
cout<<"\t2. Option 2.\n";
cout<<"\t3. Option 3.\n";
cout<<"\t4. Option 4.\n";
cout<<"\t5. Option 5.\n";
cout<<"\t6. Option 6.\n";
cout<<"\t-> Enter 0 to exit.\n\n";
cout<<"Enter your choose: ";
cin>>number;
switch(number){
case 1:
cout<<"You have selected option 1.";
break;
case 2:
cout<<"You have selected option 2.";
break;
case 3:
cout<<"You have selected option 3.";
break;
case 4:
cout<<"You have selected option 4.";
break;
case 5:
cout<<"You have selected option 5.";
break;
case 6:
cout<<"You have selected option 6.";
break;
case 0:
cout<<"Goood byeeee !!!";
break;
default:
cout<<"Your selection is not valid..";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
int main(void) {
int number;
printf("-------------Menu-------------\n\n");
printf("\t1. Option 1.\n");
printf("\t2. Option 2.\n");
printf("\t3. Option 3.\n");
printf("\t4. Option 4.\n");
printf("\t5. Option 5.\n");
printf("\t6. Option 6.\n");
printf("\t-> Enter 0 to exit.\n\n");
printf("Enter your choose: ");
scanf("%d", &number);
switch(number){
case 1:
printf("You have selected option 1.");
break;
case 2:
printf("You have selected option 2.");
break;
case 3:
printf("You have selected option 3.");
break;
case 4:
printf("You have selected option 4.");
break;
case 5:
printf("You have selected option 5.");
break;
case 6:
printf("You have selected option 6.");
break;
case 0:
printf("Goood byeeee !!!");
break;
default:
printf("Your selection is not valid..");
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 9: Check Primes with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
bool isPrimes(int n)
{
if (n < 2){
return false;
}
if (n == 2){
return true;
}
if (n % 2 == 0){
return false;
}
for (int i = 3; i < (n - 1); i += 2){
if (n % i == 0){
return false;
}
}
return true;
}
int main() {
int number;
cout<<"Enter a number: ";
cin>>number;
int a = isPrimes(number);
switch(a){
case 1:
cout<<number<<" is Primes.";
break;
case 0:
cout<<number<<" is not Primes.";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
bool isPrimes(int n)
{
if (n < 2){
return false;
}
if (n == 2){
return true;
}
if (n % 2 == 0){
return false;
}
for (int i = 3; i < (n - 1); i += 2){
if (n % i == 0){
return false;
}
}
return true;
}
int main(void) {
int number;
printf("Enter a number: ");
scanf("%d", &number);
int a = isPrimes(number);
switch(a){
case 1:
printf("%d is Primes.",number);
break;
case 0:
printf("%d is not Primes.",number);
break;
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
Example 10: Check Perfect Square number with switch...case statement in C / C++
C++ programming:
#include <iostream>
using namespace std;
bool isPerfecrSquareNum(int n){
int i = 0;
while(i*i <= n){
if(i*i == n){
return true;
}
++i;
}
return false;
}
int main() {
int number;
cout<<"Enter a number: ";
cin>>number;
int a = isPerfecrSquareNum(number);
switch(a){
case 1:
cout<<number<<" is Perfect Squares number.";
break;
case 0:
cout<<number<<" is not Perfect Squares number.";
}
cout<<"\n-------------------------------\n";
cout<<"This program is posted at learnnc.com";
return 0;
}C programming:
#include <stdio.h>
#include <stdbool.h>
bool isPerfecrSquareNum(int n){
int i = 0;
while(i*i <= n){
if(i*i == n){
return true;
}
++i;
}
return false;
}
int main(void) {
int number;
printf("Enter a number: ");
scanf("%d", &number);
int a = isPerfecrSquareNum(number);
switch(a){
case 1:
printf("%d is Perfect Squares number.",number);
break;
case 0:
printf("%d is not Perfect Squares number.",number);
break;
}
printf("\n-------------------------------\n");
printf("This program is posted at learnnc.com");
return 0;
}Output:
