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  1. #include <stdio.h>
  2. #include <stdarg.h>
  3.  
  4. void printf0( const char* format, ... ) {
  5.     va_list args;
  6.     va_start(args, format);
  7.     vprintf(format, args);
  8.     va_end( args );
  9. }
  10.  
  11. void printf1(const char* format,...) {
  12.   va_list args;
  13.   va_start(args, format);
  14.  
  15.   va_list args2;
  16.   va_copy(args2, args);
  17.   char buf[vsnprintf(NULL, 0, format, args) + 1];
  18.  
  19.   vsnprintf(buf, sizeof buf, format, args2);
  20.   printf(buf);
  21.   va_end(args);
  22.   va_end(args2);
  23. }
  24.  
  25. int main()
  26. {
  27.     printf0("Hello, %d!\n", 15);
  28.     printf1("Hello, %d!\n", 15);
  29.     return 0;
  30. }
Success #stdin #stdout 0s 2168KB
comments (?)
stdin
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Standard input is empty
stdout
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Hello, 15!
Hello, 15!
https://ideone.com/loTRNL
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
public

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