stringstream ss(s);
时间: 2024-06-12 22:08:49 浏览: 61
stringstream ss(s)是一个用于从string对象中读取字符或字符串的工具。在给定的例子中,字符串s是"ABCD",通过将s作为参数传递给stringstream构造函数,我们创建了一个名为ss的stringstream对象。然后,我们可以使用ss对象来从字符串中逐个读取字符并进行处理。
相关问题
stringstream ss(s)
This line of code initializes a stringstream object named "ss" with the string "s". A stringstream is an object in C++ that allows you to treat a string as a stream, which you can read from or write to just like you would with cin and cout.
Once you have initialized the stringstream object, you can use various methods like getline(), >> operator, etc. to extract or insert data into it. This can be useful for parsing a string or converting between different data types.
stringstream ss(s)的用法
stringstream ss(s)是将字符串s转换为stringstream对象ss。stringstream是C++标准库中的一个类,用于将字符串转换为流,可以方便地进行字符串的读写操作。
例如,我们有一个字符串s="100 200 300",我们可以使用stringstream来将其转换为三个整数:
```
#include <sstream>
#include <iostream>
using namespace std;
int main() {
string s = "100 200 300";
stringstream ss(s);
int a, b, c;
ss >> a >> b >> c;
cout << a << " " << b << " " << c << endl;
return 0;
}
```
输出结果为:
```
100 200 300
```
在这个例子中,我们首先创建了一个字符串s,然后使用stringstream ss(s)将其转换为stringstream对象ss。接着,我们定义了三个整数变量a、b、c,通过ss >> a >> b >> c来将字符串中的三个数字分别赋值给这三个变量。最后,我们输出了这三个变量的值,发现它们分别是100、200和300。