Switch Statement in C

Program 1

// Program for switch case statements
#include<stdio.h>
#include<conio.h>
int main()
{
    // Program for word format of a number
    system("cls");
    int n;
    printf("Enter a number");
    scanf("%d",&n);
    switch(n)
    {
        case 1:printf("One");break;
        case 2:printf("Two");break;
        case 3:printf("Three");break;
        case 4:printf("Four");break;
        case 5:printf("Five");break;
        default:printf("Invalid number");
    }
    return 0;
}

Program 2

// Program for switch case statements
#include<stdio.h>
#include<conio.h>
int main()
{
    // Program for Vowel
    system("cls");
    char ch;
    printf("Enter a character");
    ch=getche();
    switch(ch)
    {
        case 'a':
        case 'e':
        case 'i':
        case 'o':
        case 'u':
        case 'A':
        case 'E':
        case 'I':
        case 'O':
        case 'U':printf("\nVowel");break;
        default:printf("\nNot a Vowel");
    }
    return 0;
}

Program 3

// Program for switch case statements
#include<stdio.h>
#include<conio.h>
int main()
{
    int a,b,c,choice;
    system("cls");
    printf("\n-------------------Menu--------------------");
    printf("\n\t1. Addition");
    printf("\n \t2. Swap");
    printf("\n \t3. Grater");
    printf("\n \t4. Exit");
    printf("\n---------------------------------------------");
    printf("\n Enter a choice");
    scanf("%d",&choice);
    switch(choice)
    {
       case 1:
       {
            printf("\nEnter two Number");
            scanf("%d %d",&a,&b);
            c=a+b;
            printf("\nAddition is %d",c);
            break;
       }
        case 2:
       {
            printf("\nEnter two Number");
            scanf("%d %d",&a,&b);
            printf("\n Before swaping %d %d",a,b);
            a=a+b;
            b=a-b;
            a=a-b;
            printf("\n After swaping %d %d",a,b);
            break;
       }
       case 3:
       {
            printf("\nEnter two Number");
            scanf("%d %d",&a,&b);
            if(a>b)
             printf("\nGrater number is: %d",a);
            else
            printf("\nGrater number is: %d",b); 
       }
    }
    
    return 0;
}