The document is a C program that uses a switch case statement to allow a user to select an arithmetic operator and then perform a calculation based on the operator chosen. The program asks the user to enter a choice number between 1-4 to select addition, subtraction, multiplication, or division. It then prompts the user to enter two numbers and performs the calculation, printing the result. If an invalid number is entered, it prints an error message.

1. SWITCH
//program that ask user arithmetic operator by switch case.
#include<stdio.h>
#include<conio.h>
int main()
{
int n,a,b,c;
float e,f,g;
clrscr();
printf("Enter choice number");
scanf("%d",&n);
switch(n)
{
case 1:
printf("Enter two number for addition:");
scanf("%d%d",&a,&b);
c=a+b;
printf("n Sum=%d",c);
break;
case 2:
printf (" Enter two number for subtraction:");
scanf("%d%d",&a,&b);
c=a-b;
printf("n Sub=%d",c);
break;
case 3:
printf (" Enter two number for multiplication ");
scanf("%d%d",&a,&b);
c=a*b;
printf("n Multiplication is=%d",c);
break;
case 4:
printf ("Enter two number for division");
scanf("%f%f",&f,&g);
e=f/g;
printf("n Division is=%2f",e);
break;
default:
printf(" this is a invalid number");
break;
}
getch();
}
//created by: ANKIT DUBEY
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