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Write a C program to Make Simple calculator

#include<stdio.h>

#include<conio.h>
int main() 

{
  int num1,num2,opt;

  clrscr();
  printf("Enter the first Integer:\n");
  scanf("%d",&num1);
  printf("Enter the second Integer:\n");
  scanf("%d",&num2);
  
 
    printf("\n\n\n\nEnter the your option:\n");
    printf("1-Addition.\n2-Substraction.\n3-Multiplication.\n4-Division.\n5-Exit.\n");
    scanf("%d",&opt);
    switch(opt) {
      case 1:
        printf("\nAddition of  %d and %d is: %d",num1,num2,num1+num2);
        break;
        
      case 2:
        printf("\nSubstraction of %d  and %d is: %d",num1,num2,num1-num2);
        break;
        
      case 3:
        printf("\nMultiplication of %d  and %d is: %d",num1,num2,num1*num2);
        break;  
      
      case 4:
        if(num2==0) {
          printf("OOps Devide by zero\n");
        } else {
          printf("\n Division of %d  and %d is: %d",num1,num2,num1/num2);
        }  
        break;
        
      case 5: 
        return 0;
        break; 
        
      default:
        printf("\n Enter correct option\n");
        break; 
    }
 getch();
 return 0;
}