dag.cpp:1: 'program' is used as a type, but is not defined as a type. dag.cpp:3: parse error before `:' token dag.cpp:4: ISO C++ forbids declaration of `f1' with no type dag.cpp:4: ISO C++ forbids declaration of `f2' with no type dag.cpp:4: parse error before `:' token dag.cpp:6:12: warning: character constant too long dag.cpp:6: 'begin' is used as a type, but is not defined as a type. dag.cpp:7:12: warning: character constant too long dag.cpp:7: ISO C++ forbids declaration of `assign' with no type dag.cpp:7: initializer list being treated as compound expression dag.cpp:8: ISO C++ forbids declaration of `reset' with no type dag.cpp:9: ISO C++ forbids declaration of `rewrite' with no type dag.cpp:10: ISO C++ forbids declaration of `writeln' with no type dag.cpp:10: initializer list being treated as compound expression dag.cpp:11: ISO C++ forbids declaration of `close' with no type dag.cpp:12: ISO C++ forbids declaration of `close' with no type dag.cpp:12: redefinition of `int close' dag.cpp:11: `int close' previously defined here dag.cpp:13: syntax error before `.' token