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  1. #include <stdio.h>
  2.  
  3. void string_trim(char *input) {
  4. 	char *dest=input;
  5. 	while(*input==' ') {
  6. 		input++;
  7. 	}
  8. 	char *end=input;
  9. 	while(*input) {
  10. 		if((*dest++=*input++)!=' ') {
  11. 			end=dest;
  12. 		}
  13. 	}
  14. 	*end=0;
  15. }
  16.  
  17. void test(const char *input) {
  18. 	char *work=malloc(strlen(input)+1);
  19. 	strcpy(work,input);
  20. 	string_trim(work);
  21. 	printf("*%s* -> *%s*\n",input,work);
  22. 	free(work);
  23. }
  24.  
  25. int main(void) {
  26. 	test("test");
  27. 	test(" test");
  28. 	test("  test");
  29. 	test("test ");
  30. 	test("test  ");
  31. 	test("  te st  ");
  32. 	test("t");
  33. 	test(" t");
  34. 	test("t ");
  35. 	test("  ");
  36. 	test("");
  37. 	return 0;
  38. }
  39.  
Success #stdin #stdout 0s 5476KB
comments (?)
stdin 
Standard input is empty
stdout 
*test* -> *test*
* test* -> *test*
*  test* -> *test*
*test * -> *test*
*test  * -> *test*
*  te st  * -> *te st*
*t* -> *t*
* t* -> *t*
*t * -> *t*
*  * -> *  *
** -> **
https://ideone.com/iocf8W
language:
C (gcc 8.3)
created:
2 years ago
visibility:
secret

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