乱七八糟的笔记

string StringTool::ReplaceAll(const string& str, const string& src, const string& des)
// 将字符串str中所有的字符串src替换成字符串des
{
	string temp;
	temp.reserve(str.size());
 
	if (0 < src.length())
	{
		size_t pos = str.find(src);
		size_t lastpos = 0;
		while (pos != string::npos)
		{
			temp += str.substr(lastpos, pos - lastpos);
			temp += des;
			lastpos = pos + src.length();
			pos = str.find(src, lastpos);
		}
		if (lastpos != str.length())
		{
			temp += str.substr(lastpos, str.length() - lastpos);
		}
	}
 
	return temp;
}

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作者：zilaishuichina
来源：优快云
原文：https://blog.youkuaiyun.com/zilaishuichina/article/details/53997103
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