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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main(void) {
  5.     int i = 11;
  6.     int k = 3;
  7.     int n = snprintf(NULL, 0, "[%02d] %03d\t", i, k);
  8.     char *buf = malloc(n + 1);
  9.     snprintf(buf, n + 1, "[%02d] %03d\t", i, k);
  10.     printf("n is %d, buf contains '%s'\n", n, buf);
  11.     free(buf);
  12. }
Success #stdin #stdout 0s 9424KB
comments (?)
stdin 
Standard input is empty
stdout 
n is 9, buf contains '[11] 003	'
https://ideone.com/pt0cOQ
language:
C99 (gcc 8.3)
created:
5 years ago
visibility:
public

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