Write a program to make a simple calculator

Two numbers are entered and operation (sum,differnce,multiply,divide) to be performed is asked by the user. result is given according to the operation entered by user. (+,-,*,/)

Select To use this code as it is.. select and copy paste this code into code.cpp file :)

1. #include<iostream.h>
2. #include<conio.h>
   
3. void main()
   
4. {
   
5. clrscr();
   
6. int s;
   
7. float a,b,r;
   
8. char op;
   
9. cout<<"Please Enter a no.: ";
   
10. cin>>a;
    
11. cout<<"Please Enter operation to be performed.:(+,-,*,/,%) ";
    
12. cin>>op;
    
13. cout<<"Please Enter another no.: ";
    
14. cin>>b;
    
15. //Coding by: Snehil Khanor
16. //http://WapCPP.blogspot.com
17. switch (op)
    
18. {
    
19. case '+':
    
20. r=a+b;
    
21. break;
    
22. case '-':
    
23. r=a-b;
    
24. break;
    
25. case '*':
    
26. r=a*b;
    
27. break;
    
28. case '/':
    
29. r=a/b;
    
30. break;
    
31. default:
    
32. cout<<"Please enter Correct operation :)";
    
33. s=0;
    
34. }
    
35. if(s)
    
36. cout<<a<<op<<b<<"="<<r;
    
37. getch();
    
38. }