C++ 除錯技巧: Using Preprocessor Directive

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Debug Tips -- using Preprocessor Directive

#ifdefDEBUG

/*

Debug information

*/

#endif

__LINE__：被編譯的程式碼行號

__FILE__：檔案名稱

__TIME__：檔案被編譯的時間

__DATE__：檔案被編譯的日期

g++ compile option: -DDEBUG

// Sample Code

#include<iostream>

#include<vector>

usingstd::vector;

usingstd::cout;

usingstd::string;

usingstd::cin;

usingstd::endl;

intmain()

{

cout << "File name: "<< __FILE__ << endl;

cout << "Compile at "<< __DATE__ << ": "<< __TIME__ << endl;

#ifdefDEBUG

cout << "Beginning execution of main().\n";

#endif

string word;

vector< string > text;

while( cin >> word )

{

#ifdefDEBUG

cout << "word read: "<< word << " at line: "<< __LINE__ << "\n";

#endif

text.push_back( word );

}

return0;

}