Eroare de compilare: user.cpp: In function ‘int valid(short int, short int)’: user.cpp:24: error: ‘abs’ was not declared in this scope user.cpp: In function ‘int caut(int, int)’: user.cpp:105: error: ‘abs’ was not declared in this scope user.cpp:111: warning: left-hand operand of comma has no effect user.cpp:122: warning: left-hand operand of comma has no effect user.cpp: In function ‘int main()’: user.cpp:214: error: ‘abs’ was not declared in this scope