fork(1) download
copy 
  1. #include <stdio.h>
  2.  
  3. int main(int argc, char *argv[]) {
  4.     int number;
  5.     int places = 0;
  6.  
  7.     scanf("%d", &number);
  8.  
  9.     if ( number == 0 ) {
  10.         number = 1;
  11.     }
  12.     for ( int counter = 1; counter <= number; counter *= 10 ) {
  13.         places += 1;
  14.     }
  15.     printf("%d\n", places);
  16.  
  17.     return 0;
  18. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
prog.c: In function ‘main’:
prog.c:12:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
     for ( int counter = 1; counter <= number; counter *= 10 ) {
     ^
prog.c:12:5: note: use option -std=c99 or -std=gnu99 to compile your code
stdout
copy 
Standard output is empty
https://ideone.com/lwJcY3
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!