swap
描述 (Description)
它通过str的内容交换容器的内容,str是另一个字符串对象。 长度可能不同。
声明 (Declaration)
以下是std :: string :: swap的声明。
void swap (string& str);
C++11
void swap (string& str);
C++14
void swap (string& str);
参数 (Parameters)
str - 它是一个字符串对象。
返回值 (Return Value)
没有
异常 (Exceptions)
如果抛出异常,则字符串中没有变化。
例子 (Example)
在下面的示例中为std :: string :: swap。
#include <iostream>
#include <string>
main () {
std::string buyer ("money");
std::string seller ("goods");
std::cout << "Before the swap, buyer has " << buyer;
std::cout << " and seller has " << seller << '\n';
seller.swap (buyer);
std::cout << " After the swap, buyer has " << buyer;
std::cout << " and seller has " << seller << '\n';
return 0;
}
样本输出应该是这样的 -
Before the swap, buyer has money and seller has goods
After the swap, buyer has goods and seller has money