C Language | Switch Statement examples

Question:1

Write a C program to take input for a character check and print whether it is a vowel or not?

Sol:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char ch;
    printf("Enter any character ");
    scanf("%c",&ch);
    switch(ch)
    {
    case 'A':
    case 'a':
    case 'E':
    case 'e':
    case 'I':
    case 'i':
    case 'O':
    case 'o':
    case 'u':
    case 'U':
        printf("it is a vowel");
        break;
    default:
        printf("It is not a vowel");
        break;
    }
    return 0;
}

Output:

case 1:

Enter any character +
It is not a vowel

case 2:

Enter any character A
it is a vowel

case 3:

Enter any character e
it is a vowel

Question:2

Write a C program to take input for a character check and print whether it is a vowel or a consonant?

Sol:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char ch;
    printf("Enter any character ");
    scanf("%c",&ch);
    if((ch>='A' && ch<='Z') || (ch>='a' && ch<='z'))
    {
        printf("it is an alphabet\n");
        switch(ch)
        {
            case 'A':
            case 'a':
            case 'E':
            case 'e':
            case 'I':
            case 'i':
            case 'O':
            case 'o':
            case 'u':
            case 'U':
                printf("it is a vowel");
                break;
            default:
                printf("It is a consonent");
                break;
            }
    }
    else
        printf("it is not an alphabet");
    return 0;
}

Output:

case 1:

Enter any character e
it is an alphabet
it is a vowel

case 2:

Enter any character w
it is an alphabet
It is a consonent

case 3:

Enter any character 5
it is not an alphabet

Question: 3

Write a C program to take input for 2 numbers and an operator (+,-,*,/). Based on the entered operator calculate and display the result.

Sol:

#include <stdio.h>
int main()
{
    float a,b,c;
    char op;
    printf("Enter 2 nos ");
    scanf("%f %f",&a,&b);
    printf("Enter the operator (+, -, *, /)");
    fflush(stdin);
    scanf("%c",&op);
    switch(op)
    {
    case '+':
        c=a+b;
        printf("Sum = %f",c);
        break;
    case '-':
        if(a>b)
            c=a-b;
        else
            c=b-a;
        printf("Diff = %f",c);
        break;
    case '*':
        c=a*b;
        printf("Prod = %f",c);
        break;
    case '/':
        c=a/b;
        printf("div = %f",c);
        break;
    default:
        printf("Invalid operator");
        break;
    }

    return 0;
}

Output:

case 1:

Enter 2 nos 10
20
Enter the operator (+, -, *, /)+
Sum = 30.000000

case 2:

Enter 2 nos 2
3
Enter the operator (+, -, *, /)*
Prod = 6.000000

case 3:

Enter 2 nos 2
6
Enter the operator (+, -, *, /))
Invalid operator

Question: 4

Write a C program to take input for day number and print the day.
Example:
If input is output
1 sun
2 mon
3 tue

7 sat

Sol:

#include <stdio.h>

int main()
{
    int d;
    printf("Enter day number (1..7) ");
    scanf("%d",&d);
    switch(d)
    {
    case 1:
        printf("Sun");
        break;
    case 2:
        printf("Mon");
        break;
    case 3:
        printf("Tue");
        break;
    case 4:
        printf("Wed");
        break;
    case 5:
        printf("Thru");
        break;
    case 6:
        printf("Fri");
        break;
    case 7:
        printf("Sat");
        break;
    default:
        printf("Invalid day number");
        break;
    }
	return 0;
}

Output:

Enter day number (1..7) 2
Mon

Enter day number (1..7) 1
Sun

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