1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
// Q: But can I make all print_int_expression(…) calls go away just before I submit????
// A: (see next example)
//#define I_AM_DEBUGGING
// Without this (↑) the print_int_expression(…) will not be defined.
/*
t.c: In function ‘main’:
t.c:18:2: warning: implicit declaration of function ‘print_int_expression’ [-Wimplicit-function-declaration]
print_int_expression(3 + 5); // prints: 3 + 5 == 8
^~~~~~~~~~~~~~~~~~~~
/tmp/cckjqtHf.o: In function `main':
/web/groups/ece264/22sp/lecture/20220210/snippets/t.c:18: undefined reference to `print_int_expression'
collect2: error: ld returned 1 exit status
shell returned 1
*/
#ifdef I_AM_DEBUGGING
#define print_int_expression(n) \
( printf("%s == %d\n", (#n), (n)) )
#endif
int main(int argc, char* argv[]) {
print_int_expression(3 + 5); // prints: 3 + 5 == 8
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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