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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.   char buf[vsnprintf(NULL, 0, format, args) + 1];
  15.   va_end(args);
  16.   va_start(args, format);
  17.   vsnprintf(buf, sizeof buf, format, args);
  18.   printf(buf);
  19.   va_end(args);
  20. }
  21.  
  22. int main()
  23. {
  24.     printf0("Hello, %d!\n", 15);
  25.     printf1("Hello, %d!\n", 15);
  26.     return 0;
  27. }
Success #stdin #stdout 0s 2168KB
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stdin
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Standard input is empty
stdout
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Hello, 15!
Hello, 15!
https://ideone.com/5YI4Or
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
public

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