error: 'cont' was not declared in this scope

lanzinc

刚学linux编程，IDE:KDevelop

程序：

1. 
   
2. 
   
3. #ifdef HAVE_CONFIG_H
   
4. #include <config.h>
   
5. #endif
   
6. 
   
7. #include <iostream>
   
8. #include <cstdlib>
   
9. 
   
10. using namespace std;
    
11. 
    
12. int main(int argc, char *argv[])
    
13. {
    
14.   cout << "Hello, world!" << endl;
    
15.   cont << "aa" << setw(10) << "bb";
    
16. 
    
17.   return EXIT_SUCCESS;
    
18. }
    
19. 
    

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错误：

1. 
   
2. 正在编译 ex2.cpp (g++)
   
3. /root/C++/Ex2/src/ex2.cpp: In function 'int main(int, char**)':
   
4. /root/C++/Ex2/src/ex2.cpp:34: error: 'cont' was not declared in this scope
   
5. /root/C++/Ex2/src/ex2.cpp:34: error: 'setw' was not declared in this scope
   
6. make: *** [ex2.lo] 错误 1
   
7. *** 退出状态：2 ***
   
8. 
   

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我已经

#include <iostream>

using namespace std;

为什么还会有这样的错误
百思不得其解。