Compilare: main.cpp: In function 'int f(int, int, int, int)': main.cpp:37:23: warning: left operand of comma operator has no effect [-Wunused-value] 37 | return (k - 1, lin, col - lat, 3) + nr; | ~~^~~ main.cpp:37:39: warning: right operand of comma operator has no effect [-Wunused-value] 37 | return (k - 1, lin, col - lat, 3) + nr; | ^~~ main.cpp:37:37: warning: right operand of comma operator has no effect [-Wunused-value] 37 | return (k - 1, lin, col - lat, 3) + nr; | ~~~~^~~~~