{"version":"1.0","author_name":"pyopyopyo","provider_url":"https://hatena.blog","blog_title":"pyopyopyo - Linux\u3068\u304b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u899a\u3048\u66f8\u304d - ","height":"190","author_url":"https://blog.hatena.ne.jp/pyopyopyo/","categories":["c++","programming"],"title":"iostream \u3084 std::string\u3067printf\u306e\u3088\u3046\u306a\u66f8\u5f0f\u6307\u5b9a\u3092\u884c\u3046\u65b9\u6cd5 (C++11\u7248)","type":"rich","description":"C++11\u3092\u4f7f\u3046\u3068\u7dba\u9e97\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059 \u307e\u305a format() \u3068\u3044\u3046\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u3092\u4f5c\u308a\u307e\u3059\uff0eC++11\u3067\u65b0\u3057\u304f\u5c0e\u5165\u3055\u308c\u305f\uff0c\u53ef\u5909\u5f15\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\uff0c\u304a\u3088\u3073 std::snprintf() \u3092\u4f7f\u3044\u307e\u3059\uff0e #include <string> #include <cstdio> #include <vector> template <typename ... Args> std::string format(const std::string& fmt, Args ... args ) { size_t len = std::snprintf( nullptr, 0, fmt.c_str(), ar\u2026","provider_name":"Hatena Blog","blog_url":"https://pyopyopyo.hatenablog.com/","image_url":null,"published":"2019-02-08 10:24:56","width":"100%","url":"https://pyopyopyo.hatenablog.com/entry/2019/02/08/102456","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpyopyopyo.hatenablog.com%2Fentry%2F2019%2F02%2F08%2F102456\" title=\"iostream \u3084 std::string\u3067printf\u306e\u3088\u3046\u306a\u66f8\u5f0f\u6307\u5b9a\u3092\u884c\u3046\u65b9\u6cd5 (C++11\u7248) - pyopyopyo - Linux\u3068\u304b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u899a\u3048\u66f8\u304d - \" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}