How Not to Program in C++

C Code, C Code Break 107

Program 71: Unsynchronized

The assignment here is to make a four-function calculator. The user is supposed

to type in an operator and a number, and the calculator goes to work. For

example:

Enter operator and value: + 10

Total: 10

But things don’t go as expected.

1 /************************************************

2 * calc -- Simple 4 function calculator. *

3* *

4 * Usage: *

5 * $ calc *

6 * Enter operator and value: + 5 *

7* *

8 * At the end of each operation the acculated *

9 * results are printed. *

10 ************************************************/

11 #include <stdio.h>

12 #include <stdlib.h>

13 int main() {

14 char oper; /* Operato ...