trip.cpp: In function `void euler(int)': trip.cpp:12: warning: unused variable `int i' trip.cpp:12: warning: unused variable `int j' trip.cpp: In function `int main()': trip.cpp:64: `v' undeclared (first use this function) trip.cpp:64: (Each undeclared identifier is reported only once for each function it appears in.) trip.cpp:34: warning: unused variable `int h'