public member function
<string>
bool empty() const noexcept;
Test whether string is empty
示例
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
// string::empty
#include <iostream>
#include <string>
int main ()
{
std::string content;
std::string line;
std::cout << "Please introduce a text. Enter an empty line to finish:\n";
do {
getline(std::cin,line);
content += line + '\n';
} while (!line.empty());
std::cout << "The text you introduced was:\n" << content;
return 0;
}
|
This program reads the user input line by line and stores it into stringcontentuntil an empty line is introduced.