br.cpp: In function 'int main()': br.cpp:7: error: 'stdin' was not declared in this scope br.cpp:7: error: 'freopen' was not declared in this scope br.cpp:8: error: 'stdout' was not declared in this scope br.cpp:10: error: 'scanf' was not declared in this scope br.cpp:31: error: 'printf' was not declared in this scope