ksecv.cpp:1: error: 'Test' does not name a type ksecv.cpp: In function 'void read()': ksecv.cpp:23: error: 'stdin' was not declared in this scope ksecv.cpp:23: error: 'freopen' was not declared in this scope ksecv.cpp:24: error: 'scanf' was not declared in this scope ksecv.cpp:27: error: 'fclose' was not declared in this scope ksecv.cpp: In function 'void write(int, int)': ksecv.cpp:66: error: 'stdout' was not declared in this scope ksecv.cpp:66: error: 'freopen' was not declared in this scope ksecv.cpp:67: error: 'printf' was not declared in this scope ksecv.cpp:68: error: 'fclose' was not declared in this scope