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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. void trim_right(char *s) {
  5. 	char *space_pos = NULL;
  6. 	for(;;++s) {
  7. 		char ch = *s;
  8. 		if(ch == '\0') {
  9. 			break;
  10. 		} else if(ch == ' ') {
  11. 		    if(!space_pos)
  12.                 space_pos = s;
  13. 		} else {
  14. 			space_pos = NULL;
  15. 		}
  16. 	}
  17. 	if(space_pos) {
  18. 		*space_pos = '\0';
  19. 	}
  20. }
  21.  
  22. char buf[1024];
  23. void test(const char *arg, const char *expected) {
  24. 	snprintf(buf, sizeof(buf), "%s", arg);
  25. 	trim_right(buf);
  26. 	if(strcmp(buf, expected) == 0) {
  27. 		printf("OK: '%s' -> '%s'\n", arg, expected);
  28. 	} else {
  29. 		printf("FAIL: arg is '%s', expected '%s', found '%s'.\n", arg, expected, buf);
  30. 	}
  31. }
  32.  
  33. int main(void) {
  34. 	test("", "");
  35. 	test("word", "word");
  36. 	test(" foo ", " foo");
  37. 	test(" bar   ", " bar");
  38. 	test("     ", "");
  39. 	test("this failure is expected", "...");
  40. 	return 0;
  41. }
  42.  
Success #stdin #stdout 0s 2160KB
comments (?)
stdin 
Standard input is empty
stdout 
OK: '' -> ''
OK: 'word' -> 'word'
OK: ' foo ' -> ' foo'
OK: ' bar   ' -> ' bar'
OK: '     ' -> ''
FAIL: arg is 'this failure is expected', expected '...', found 'this failure is expected'.
https://ideone.com/Sx9jAn
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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