Main.cc:1:21: warning: multi-line comment [-Wcomment] #include //scanf()\ ^ Main.cc:4:10: error: expected constructor, destructor, or type conversion before '(' token scanf("%d%d%d",&a,&b,&c); ^ Main.cc:5:5: error: expected unqualified-id before 'if' if((a+b>c)&&(a-b>c)){ ^