src.cpp: In function 'int main()':
src.cpp:8:31: error: 'stdin' was not declared in this scope
freopen("CAUCA.INP", "r", stdin);
^
src.cpp:8:36: error: 'freopen' was not declared in this scope
freopen("CAUCA.INP", "r", stdin);
^
src.cpp:9:31: error: 'stdout' was not declared in this scope
freopen("CAUCA.OUT", "w", stdout);
^
src.cpp:43:17: error: 'fclose' was not declared in this scope
fclose(stdin);
^