c++中substr函数用法
时间: 2023-09-11 21:13:00 浏览: 54
substr函数是C++中的一个成员函数,用于复制源字符串的子字符串。它有两种形式:s.substr(pos, len)和s.substr(pos)。第一种形式返回从索引为pos开始的len个字符的拷贝,如果不指定len,则默认拷贝从pos到字符串末尾的所有字符。第二种形式只提供一个索引位置pos,它会截取从pos到字符串末尾的所有字符的拷贝。如果不提供任何参数,它与s的拷贝相同。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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