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C++でsprintf的な文字列フォーマットを行う

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C++には、sprintf的な文字列フォーマットを行う機能は標準では備わっていない。そのため、Boost Format Libraryに含まれるboost::formatを使うなどする必要がある。

Boost Format Libraryを使う場合の例:

// サンプルコード
#include <iostream>
#include <string>
#include <boost/format.hpp>

int main()
{
    const std::string s = (boost::format("%03.4d %s") % 3 % "abc").str();
    std::cout << s << std::endl;
}

実行結果:

003 abc

参考

文字列フォーマット - boostjp : Boost日本語情報サイト
https://boostjp.github.io/tips/format.html

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