Program : 5

PROGRAM - 5(a)

Write a program, which takes two integers operands and one operator from the user, performs the operation and then prints the result. (Consider the operations +,-,*,/,%, use switch statement).

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

char oper;

int num1,num2,result;

clrscr();

printf("enter num1 oper num2 : ");

scanf("%d %c %d",&num1,&oper,&num2);

switch (oper)

{

case '+' :

           result=num1+num2;

           break;

case '-' :

           result=num1 - num2;

           break;

case '*' :

           result=num1 * num2;

           break;

case '/' :

           result=num1 / num2;

           break;

case '%' :

           result=num1 % num2;

           break;

default :

           printf("unknown operator");

           break;

}

printf("%d %c %d = %d",num1,oper,num2,result);

getch();

}

/*   OUTPUT: enter num1 oper num2 :2 + 3

                2+3=5

*/

PROGRAM - 5(b)

Write a program to find the grace marks for a student using switch. The user should enter the class obtained by the student and the number of subjects he has failed in. Use the following rules:

ü  If the student gets first class and the number of subjects failed in is > 3, then no grace marks are awarded. If the number of subjects he has failed in is <= 3 then the grace is 5 marks per subject.

ü  If the student gets second class and the number of subjects failed in is >2, then no grace marks are awarded. If the number of subjects failed in is <= 2 then the grace is 4 marks per subject.

ü  If the student gets third class and the number of subjects failed in is >1, then no grace marks are awarded. If the number of subjects failed in is =1 then the grace is 5 marks per subject. 

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

     int n,cl;

     clrscr();

     printf("Enter no.of subjects student failed 

                         and class obtained : ");

     scanf("%d %d",&n,&cl);

     if (n>3 && cl==1)

           n=1;

     else if (n<=3 && cl==1)

           n=2;

     else if (n>2 && cl==2)

           n=3;

     else if (n<=2 && cl==2)

           n=4;

     else if (n>1 && cl==3)

           n=5;

     else if (n==1 && cl==3)

           n=6;

     else {}

     switch (n)

     {

     case 1 :

           printf("\n No grace marks");

           break;

     case 2 :

           printf("\n grace is 5 marks");

           break;

     case 3 :

           printf("\n No grace marks");

           break;

     case 4 :

           printf("\n grace is 4 marks");

           break;

     case 5 :

           printf("\n No grace marks");

           break;

     case 6 :

           printf("\n grace is 5 marks");

           break;

     }

     getch();

}