Menu Driven Calculator

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c,ch;

clrscr();

printf(“\n1.add\n2.subtract\n3.multiply\n4.division\n5.remainder\n);

printf(“\nenter your choice\n”);

scanf(“%d”,&ch);

switch(ch)

{

case1:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a+b;

printf(“\nthe answer is %d”,c);

break;

case2:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a-b; 

printf(“\nthe answer is %d”,c);

break;

case3:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a*b; 

printf(“\nthe answer is %d”,c);

break;

case4:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a/b; 

printf(“\nthe answer is %d”,c);

break;

case5:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a%b; 

printf(“\nthe answer is %d”,c);

break;

default:

printf(“\nenter the correct choice”);

break;

}

getch();

}

Output:

1.add

2.subtract

3.multiply

4.division

5.remainder

enter your choice

2

enter the values  of a and b

7

4

the answer is 3 

Greatest of two Numbers - Conditional Operator

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b;

clrscr();

printf(“enter the 2 numbers”);

scanf(“%d%d”,&a,&b);

(a>b?printf(“a is greater”):printf(“b is greater”));

getch();

}

Output:

enter the two numbers

6

3

a is greater 

Area and Perimeter of Square

#include<stdio.h>

#include<conio.h>

void main()

{

float s,a,p;

clrscr();

printf(“enter the s value:\n”);

scanf(“%f”,&s);

a=s*s;

p=4*s;

printf(“area=%f\n perimeter=%f\n”,a,p);

getch();

}

Output:

enter the s value:

5

area=25.000000

perimeter=20.000000 

Area and Perimeter of Rectangle

#include<stdio.h>

#include<conio.h>

void main()

{

float a,b,l,p;

clrscr();

printf(“enter the l and b value:\n”);

scanf(“%f%f”,&l,&b);

a=l*b;

p=2*(l+b);

printf(“area=%f\n perimeter=%f\n”,a,p);

getch();

}


Output:

enter the l and b value:

6

8

area=48.000000

perimeter=28.000000