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  1. #include <stdlib.h>
  2. #include <string.h>
  3. #include <stdio.h>
  4.  
  5. char * repeat_str(size_t count, const char * src)
  6. {
  7.    size_t len = strlen(src);
  8.    char * result = (char *) malloc(sizeof(char) * (len * count + 1));
  9.  
  10.    if (result == NULL) {
  11.    	return NULL;
  12.    }
  13.  
  14.    for(size_t i = 0; i < count; i++) {
  15.    	strncpy(result + i*len, src, len);
  16.    }
  17.  
  18.    result[count * len] = '\0';
  19.    return result;
  20. }
  21.  
  22. int main(void)
  23. {
  24. 	char * result = repeat_str(3, "hello ");
  25. 	if (result == NULL) {
  26. 		printf("OOM\n");
  27. 		return EXIT_FAILURE;
  28. 	}
  29. 	int success = strcmp(result, "hello hello hello ") == 0;
  30. 	printf("Result: '%s' (success: %d)", result, success);
  31. 	return success ? EXIT_SUCCESS : EXIT_FAILURE;
  32. }
Success #stdin #stdout 0s 9424KB
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Standard input is empty
stdout
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Result: 'hello hello hello ' (success: 1)
https://ideone.com/IjXaLk
language:
C (gcc 8.3)
created:
8 years ago
visibility:
secret

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