Printing values in DEBUG mode : define « Development « C++ Tutorial

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C++ Tutorial » Development » define

5.16.6.Printing values in DEBUG mode

#include <iostream>

 #define DEBUG

 

 #ifndef DEBUG

 #define PRINT(x)

 #else

 #define PRINT(x) std::cout << #x << ":\t" << x << std::endl;

 #endif

 

 int main()

 {

     int x = 5;

     long y = 78l;

     PRINT(x);

     

     for (int i = 0; i < x; i++)

     {

         PRINT(i);

     }

 

     PRINT (y);

     PRINT("Hi.");

     int *px = &x;

     PRINT(px);

     PRINT (*px);

     return 0;

 }

x:      5
i:      0
i:      1
i:      2
i:      3
i:      4
y:      78
Hi.":  Hi.
px:     0x22ff74
*px:    5

5.16.define
	5.16.1.	ASSERTS
	5.16.2.	function macro of get the max value number
	5.16.3.	Using parentheses in macros.
	5.16.4.	Using inline rather than a macro.
	5.16.5.	A simple assert() macro.
	5.16.6.	Printing values in DEBUG mode

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