View Compilation Error

0_0_21295361_10261.cpp: In function 'int main()':
0_0_21295361_10261.cpp:9:11: error: 'cin' was not declared in this scope
     while(cin>>m)  
           ^
0_0_21295361_10261.cpp:34:13: error: 'cout' was not declared in this scope
             cout<<cnt+1<<endl;  
             ^
0_0_21295361_10261.cpp:34:26: error: 'endl' was not declared in this scope
             cout<<cnt+1<<endl;  
                          ^