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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdio.h>
  4. #include <stdlib.h>
  5.  
  6. int main(void) {
  7. 	char *tab = malloc(30 + 1);
  8. 	if (tab == NULL) {
  9. 		return -1;
  10. 	}
  11. 	strcpy(tab, "123456789.123456789.123456789.");
  12. 	printf("Original string: %s\n", tab);
  13.     size_t actualSize = strlen(tab);
  14.  
  15. 	int dotNumb = 0;
  16. 	for (int i = 0; i < actualSize; i++) {
  17.   		if (tab[i]=='.') {
  18.     		dotNumb++;
  19.   		}
  20. 	}
  21. 	const size_t newSize = dotNumb + actualSize + 1;
  22. 	tab = realloc (tab, newSize);
  23. 	if (tab == NULL) {
  24.   		free(tab);
  25.   		return -1;
  26. 	}
  27. 	tab[newSize] = '\0'; /* termination character */
  28. 	int j = newSize ;
  29. 	for (size_t cursor = actualSize; cursor > 0; cursor--) {
  30.   		if (tab[cursor] != '.') {
  31. 	 		tab[j--] = tab[cursor];
  32.   		}
  33.   		else { 
  34. 	 		tab[j--] = ':';
  35.     		tab[j--] = ':';
  36.   		}
  37. 	}
  38. 	printf("Modified string: %s\n", tab);
  39. 	return 0;
  40. }
  41.  
Success #stdin #stdout 0s 2424KB
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stdin
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Standard input is empty
stdout
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Original string: 123456789.123456789.123456789.
Modified string: 1223456789::123456789::123456789::
https://ideone.com/YOxJKo
language:
C99 (gcc 8.3)
created:
11 years ago
visibility:
public

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