我有下面的代碼爲什麼我不能使用字符串?
#include <iostream>
#include <string>
main(){
std::cout << "What's Your Name? ";
string x = "";
std::cin >> x;
std::cout << std::endl << "Nice to meet you " << x << "!" << std::endl;
}
和我得到這個錯誤
Running /home/ubuntu/workspace/client.cpp
/home/ubuntu/workspace/client.cpp: In function ‘int main()’:
/home/ubuntu/workspace/client.cpp:6:5: error: ‘string’ was not declared in this scope
string x = "";
^
/home/ubuntu/workspace/client.cpp:6:5: note: suggested alternative:
In file included from /usr/include/c++/4.8/iosfwd:39:0,
from /usr/include/c++/4.8/ios:38,
from /usr/include/c++/4.8/ostream:38,
from /usr/include/c++/4.8/iostream:39,
from /home/ubuntu/workspace/client.cpp:1:
/usr/include/c++/4.8/bits/stringfwd.h:62:33: note: ‘std::string’
typedef basic_string<char> string;
^
/home/ubuntu/workspace/client.cpp:6:12: error: expected ‘;’ before ‘x’
string x = "";
^
/home/ubuntu/workspace/client.cpp:7:17: error: ‘x’ was not declared in this scope
std::cin >> x;
^
爲什麼我不能夠使用一個字符串?我正在使用Cloud9運行它,而且對於C++來說還是比較新的。如何將cin
的輸入傳輸到字符串x
?
'的std :: string'不'string' – jaggedSpire
附註:這是'INT主要()',裸機'的main()'是[生病 - 形式](http://stackoverflow.com/questions/331148/does-c-allow-default-return-types-for-functions) – dhke
對於這樣的小項目,你可以做一個'使用命名空間標準;'右包括之後。 – sp2danny