ch3-StringizingExpressions

Chapter_3     Exercise_3-24     DynamicDebugFlags

Exercise_3-31     Exercise_3-25

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StringizingExpressions     TCP1, p. 211-212  (stringizing_expressions.c,  StringizingExpressions.cpp)

stringizing_expressions.c         download

#include <stdio.h> // for printf()
// print `A' as an int:
#define P(A) printf("%s: %d\n", #A, A) // no semicolon here

int main()
{
int a = 1, b = 2, c = 3;

P(a); P(b); P(c); // semicolons
P(a + b); // here
P((c - a)/b);

return 0;
}
/*
g++ stringizing_expressions.c -o stringizing_expressions
./stringizing_expressions
a: 1
b: 2
c: 3
a + b: 3
(c - a)/b: 1
*/

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StringizingExpressions.cpp         download

#include <iostream>
using std::cout;
using std::endl;

#define P(A) cout << #A << ": " << (A) << endl // no semicolon here

int main()
{
int a = 1, b = 2, c = 3;

P(a); P(b); P(c); // semicolons
P(a + b); // here
P((c - a)/b);

return 0;
}
/*
g++ StringizingExpressions.cpp -o StringizingExpressions
./StringizingExpressions
a: 1
b: 2
c: 3
a + b: 3
(c - a)/b: 1
*/

Note:  See also ch3-PointerArithmetic in Section ch3-Composite_Types.

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