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  1. #include <assert.h>
  2. #include <locale.h>
  3. #include <stdio.h>
  4. #include <stdlib.h>
  5.  
  6.  
  7. int main(void) {
  8. 	char *numstr;
  9. 	int out_len;
  10.  
  11. 	unsigned long long num = 1649463153695818612;
  12.  
  13. 	setlocale(LC_ALL, "");
  14.  
  15. 	const int len = snprintf(NULL, 0, "%'llu", num);
  16. 	assert(len > 0);
  17.  
  18. 	numstr = malloc((size_t) len + 1);
  19. 	assert(numstr != NULL);
  20.  
  21. 	out_len = snprintf(numstr, len + 1, "%'llu", num);
  22. 	assert(out_len == len && numstr[len] == 0);
  23.  
  24. 	printf("%s\n", numstr);
  25.  
  26. 	free(numstr);
  27.  
  28.  
  29. 	return 0;
  30. }
Success #stdin #stdout 0s 3996KB
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Standard input is empty
stdout
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1,649,463,153,695,818,612
https://ideone.com/zqnZqg
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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