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. }