View Compilation Error

0_0_23592818_26297.cpp: In function 'int main()':
0_0_23592818_26297.cpp:25:9: error: 'cout' was not declared in this scope
         cout<<ma<<endl;  
         ^
0_0_23592818_26297.cpp:25:19: error: 'endl' was not declared in this scope
         cout<<ma<<endl;  
                   ^