stringstream input(str);
时间: 2023-11-27 07:04:05 浏览: 31
This line of code initializes a stringstream object named "input" with the string "str". This allows the stringstream to read data from the string as if it were a stream of input data. The stringstream class provides a convenient way to manipulate and parse strings, allowing you to extract and convert values from the input stream as needed.
相关问题
stringstream input_T(str);
这段代码的作用是将一个字符串 `str` 转化为 `stringstream` 对象 `input_T`,以便将其作为输入流进行读取和处理。`stringstream` 是 C++ 中的一个类,可以将字符串作为输入流或输出流进行处理,类似于标准输入输出流 `cin` 和 `cout`。通过使用 `stringstream` 对象,我们可以方便地将字符串按照需要进行分割、解析和转换等操作。
stringstream
stringstream is a class in C++ that provides an easy way to manipulate strings as if they were input/output streams. It allows you to convert a string to a stream and vice versa. You can use it to read data from a string, write data to a string, or both. The stringstream class is part of the header file <sstream>.
Here is an example of how to use stringstream:
```
#include <iostream>
#include <sstream>
int main() {
std::string str = "10 20 30";
std::stringstream ss(str); // Create a stringstream object from the string
int num;
while (ss >> num) { // Read integers from the stringstream
std::cout << num << std::endl; // Print the integers
}
return 0;
}
```
In this example, a string "10 20 30" is converted into a stringstream object. The while loop reads integers from the stringstream object until there are no more integers to read. Each integer is then printed to the console.
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