c++之调试帮助

c++之调试帮助

assert()

assert(expr): 如果表达式为假， assert输出信息并终止程序。如果为真，assert什么也不做。

NDEBUG

#include <iostream>

int main(int argc, char** argv)
{
  int a = 1, b = 2;
  if (a < b)
  {
    std::cerr << "Error occur in " << __FILE__ << " File; " << std::endl 
              << "in " << __func__ << " Function; at " << __LINE__ << " Line; " << std::endl
              << "Compile on " << __DATE__ << "  at  " << __TIME__ << std::endl;
  }
  return 0;
}

Error occur in /home/liuzhiyang/workspace/unit_test/src/unit_test/src/cpp_test.cpp File;
in main Function; at 35 Line;
Compile on Dec 25 2018  at  19:18:01

__FILE__ : 存放文件名的字符串字面值

__LINE__：存放当前行号的整形字面值

__func__： 存放当前函数名的字符串字面值

__DATA__： 存放文件编译日期的字符串字面值

__TIME__： 存放文件编译时间的字符串字面值