Eroare de compilare: user.cpp: In function ‘int euclid(int, int)’: user.cpp:10:14: warning: left operand of comma operator has no effect [-Wunused-value] return (a/b,a%b); ^ user.cpp: At global scope: user.cpp:13:11: error: ‘::main’ must return ‘int’ void main() ^ user.cpp: In function ‘int main()’: user.cpp:30:5: error: ‘retrun’ was not declared in this scope retrun 0; ^ user.cpp:30:12: error: expected ‘;’ before numeric constant retrun 0; ^