fork download
copy 
  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstdarg>
  4. #include <string>
  5. #include <vector>
  6. #include <boost/format.hpp>
  7.  
  8. std::string string_format(const char *fmt, ...) {
  9.     std::vector<char> str(100);
  10.     va_list ap;
  11.     while (1) {
  12.         va_start(ap, fmt);
  13.         int n = vsnprintf(&str[0], str.size(), fmt, ap);
  14.         va_end(ap);
  15.         if (n > -1 && n < str.size()) {
  16.             str.resize(n);
  17.             return &str[0];
  18.         }
  19.         str.resize(str.size() * 2);
  20.     }
  21. }
  22.  
  23. int main() {
  24.   std::cout << string_format("%s %s %s!\n", "Hello", "World");
  25.   std::cout << boost::format("%s %s %s!\n") % "Hello" % "World";
  26.   return 0;
  27. }
Runtime error #stdin #stdout 0.01s 2852KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Hello World D!
https://ideone.com/63BK1
language:
C++ (gcc 8.3)
created:
11 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!