SwitchCase Statement Programs In C

Write a  program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer, calculate percentage and grade according to given conditions using switch case
If percentage >= 90% : Grade A
If percentage >= 80% : Grade B
If percentage >= 70% : Grade C
If percentage >= 60% : Grade D
If percentage >= 40% : Grade E
If percentage < 40% : Fail

#include <stdio.h>

#include<conio.h>

void main()

{

 int phy, chem, bio, math, comp,n;

 float per;

 clrscr();

    printf("Enter five subjects marks: ");

    scanf("%d%d%d%d%d", &phy, &chem, &bio, &math, &comp);

  /* Calculate percentage */

 per = (phy + chem + bio + math + comp) / 5.0;

 printf("Percentage = %f\n", per);

* Find grade according to the percentage */

    if(per >= 90)

    {

        n=1;

    }

    else if(per >= 80)

    {

      n=2;

    }

    else if(per >= 70)

    {

       n=3;

 }

    else if(per >= 60)

    {

      n=4;

    }

     else if(per >= 40)

    {

      n=5;

    }

    else

    {

      n=6;

    }

    switch(n)

    {

        case 1:

        printf("Grade A");

        break;

        case 2:

        printf("Grade B");

        break;

        case 3:

        printf("Grade C");

        break;

        case 4:

        printf("Grade D");

        break;

        case 5:

        printf("Grade E");

        break;

        default:

        printf("Fail");

   }

getch();

}

Write C Program To Create Simple Calculator (all arithmetic operation) using Switch Case

#include <stdio.h>

#include<conio.h>

void main()

{

   char op;

    int firstNumber,secondNumber;

   clrscr();

    printf("Enter an operator (+, -, *,/)");

    scanf("%c", &op);

    printf("Enter two operands: ");

    scanf("%d%d",&firstNumber, &secondNumber);

    switch(op)

    {

        case '+':

            printf("%d",(firstNumber + secondNumber));

            break;

        case '-':

            printf("%d",(firstNumber - secondNumber));

            break;

         case '*':

            printf("%d",(firstNumber * secondNumber));

            break;

        case '/':

            printf("%d",(firstNumber / secondNumber));

            break;

        // operator doesn't match  (+, -, *, /)

        default:

            printf("invalid operator");

 }

getch();

}

To check vowel or consonant using switch case

#include <stdio.h>

#include<conio.h>

void main()

{

 char ch;

clrscr();

printf("Enter any alphabet: ");

scanf("%c", &ch);

 switch(ch)

    {

        case 'a':

            printf("Vowel");

         break;

        case 'e':

            printf("Vowel");

            break;

        case 'i':

            printf("Vowel");

            break;

        case 'o':

            printf("Vowel");

            break;

        case 'u':

            printf("Vowel");

            break;

        case 'A':

            printf("Vowel");

            break;

        case 'E':

            printf("Vowel");

            break;

        case 'I':

            printf("Vowel");

            break;

        case 'O':

            printf("Vowel");

            break;

        case 'U':

            printf("Vowel");

            break;

    default:

            printf("Consonant");

    }

getch();

}

To print number of days in a month using switch case 

#include <stdio.h>

#include<conio.h>

void main()

{

   int month;

   clrscr();

    /* Input month number from user */

    printf("Enter month number(1-12): ");

    scanf("%d", &month);

 

    switch(month)

    {

        case 1:

            printf("31 days");

            break;

        case 2:

            printf("28/29 days");

            break;

        case 3:

            printf("31 days");

            break;

        case 4:

            printf("30 days");

            break;

        case 5:

            printf("31 days");

            break;

        case 6:

            printf("30 days");

            break;

        case 7:

            printf("31 days");

            break;

        case 8:

            printf("31 days");

            break;

        case 9:

            printf("30 days");

            break;

        case 10:

            printf("31 days");

            break;

        case 11:

            printf("30 days");

            break;

        case 12:

            printf("31 days");

            break;

        default:

            printf("Invalid month! Please enter month number between 1-12");

}

getch();

}

 

 

To check Even or Odd number using switch case

#include <stdio.h>

#include<conio.h>

void main()

{

  int num;

 clrscr();

printf("Enter any number to check even or odd: ");

scanf("%d", &num);

switch(num % 2)

    {

        /* If n%2 == 0 */

        case 0:

            printf("Number is Even");

            break;

 

        /* Else if n%2 == 1 */

        case 1:

            printf("Number is Odd");

            break;

    }

  getch();

}

Find maximum between two numbers using switch case

#include <stdio.h>

#include<conio.h>

void main()

{

   int numb1, numb2;

   clrscr();

    printf("Enter two numbers ");

    scanf("%d%d", &numb1, &numb2);

    switch(numb1 > numb2)

    {   

        /* If condition (numb1>numb2) is false */

        case 0: 

            printf("%d is maximum", numb2);

            break;

        /* If condition (numb1>numb2) is true */

        case 1: 

            printf("%d is minimum", numb1);

            break;

        }

   getch();

  }

To print day of week using switch case

 #include <stdio.h>

#include<conio.h>

void main()

{

   int week;

    clrscr();

  printf("Enter week number(1-7): ");

    scanf("%d", &week);

    switch(week)

    {

        case 1:

            printf("Monday");

            break;

        case 2:

            printf("Tuesday");

            break;

        case 3:

            printf("Wednesday");

            break;

        case 4:

            printf("Thursday");

            break;

        case 5:

            printf("Friday");

            break;

        case 6:

            printf("Saturday");

            break;

        case 7:

            printf("Sunday");

            break;

        default:

            printf("Invalid week! Please enter week number between 1-7.");

          }

getch();

}