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程序4

如果你是一个程序员，肯定犯过下文程序中包含的错误，如果你正在学习编程，也将会犯这样的错误，而且如果找不出问题所在，它也会令你焦头烂额

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

2 * test logic for a simple accounting *

3 * program *

4 *******************************************/

5 #include<iostream>

6

7 int main()

8 {

9 //Amount owed (if any) by the user

10 int amount;

11

12 std::cout<<“enter current balance:”;

13 std::cin>>amount;

14

15 if(amount=0)

16 std::cout<<“you owe noting\n”;

17 else

18 std::cout<<“you owe”<<amount<<“\n”;

19

20 return(0);

21 }

答案：g++编译器输出如下警告：

equal.cpp:In function ‘int main()’:

equal.cpp:15:warning:suggest parentheses around assignment used as truth value

典型的运行过程如下

$equal

enter current balance:10

you owe 0