用另一个子字符串C ++替换子字符串 [英] Replace substring with another substring C++

问题描述

如何将一个字符串中的子字符串替换为C ++中的另一个子字符串，我可以使用什么函数？

How could I replace a substring in a string with another substring in C++, what functions could I use?

eg: string test = "abc def abc def";
test.replace("abc", "hij").replace("def", "klm"); //replace occurrence of abc and def with other substring

推荐答案

在C ++中没有一个内置函数来做到这一点。如果你想用一个子字符串替换另一个子字符串的所有实例，你可以通过调用 string :: find 和 string ::替换。例如：

There is no one built-in function in C++ to do this. If you'd like to replace all instances of one substring with another, you can do so by intermixing calls to string::find and string::replace. For example:

size_t index = 0;
while (true) {
     /* Locate the substring to replace. */
     index = str.find("abc", index);
     if (index == std::string::npos) break;

     /* Make the replacement. */
     str.replace(index, 3, "def");

     /* Advance index forward so the next iteration doesn't pick it up as well. */
     index += 3;
}

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