Difference between revisions of "C programming/Debug"
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m (Created page with "=Simple= <source lang=c> #include <stdio.h> // debugging macros so we can pin down message origin at a glance #define WHERESTR "[file %s, line %d]: " #define WHEREARG __FILE__,...") |
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#define DEBUGPRINT(_fmt, ...) DEBUGPRINT2(WHERESTR _fmt, WHEREARG, __VA_ARGS__) | #define DEBUGPRINT(_fmt, ...) DEBUGPRINT2(WHERESTR _fmt, WHEREARG, __VA_ARGS__) | ||
//... | //... | ||
| − | |||
int main(main) { | int main(main) { | ||
| Line 20: | Line 19: | ||
Compile and run | Compile and run | ||
| − | <source lang= | + | <source lang=bash> |
[root@oldmars bin]#gcc debug.c -o debug | [root@oldmars bin]#gcc debug.c -o debug | ||
[root@oldmars bin]#./debug | [root@oldmars bin]#./debug | ||
| Line 27: | Line 26: | ||
Done | Done | ||
</source> | </source> | ||
| + | |||
| + | [[Category:C]] | ||
Latest revision as of 16:01, 24 November 2020
Simple
#include <stdio.h>
// debugging macros so we can pin down message origin at a glance
#define WHERESTR "[file %s, line %d]: "
#define WHEREARG __FILE__, __LINE__
#define DEBUGPRINT2(...) fprintf(stderr, __VA_ARGS__)
#define DEBUGPRINT(_fmt, ...) DEBUGPRINT2(WHERESTR _fmt, WHEREARG, __VA_ARGS__)
//...
int main(main) {
int x = 9;
printf("Real code....\n");
DEBUGPRINT("I am a debug string...., x=%d\n", x);
printf("Done\n");
return(0);
}
Compile and run
[root@oldmars bin]#gcc debug.c -o debug
[root@oldmars bin]#./debug
Real code....
[file debug.c, line 13]: I am a debug string...., x=9
Done