Compilare: main.cpp: In function 'int verif1(int, int, int, int)': main.cpp:10:21: warning: left operand of comma operator has no effect [-Wunused-value] for(i=x1,j=y11;i<=x2,j<=y2;i++,j++) ~^~~~ main.cpp: In function 'int verif2(int, int, int, int)': main.cpp:24:21: warning: left operand of comma operator has no effect [-Wunused-value] for(i=x1,j=y11;i<=x2,j>=y2;i++,j--) ~^~~~ main.cpp: In function 'int verif3(int, int, int, int)': main.cpp:37:20: warning: left operand of comma operator has no effect [-Wunused-value] for(i=x2,j=y2;i>=x1,j>=y11;i--,j--) ~^~~~ main.cpp: In function 'int verif4(int, int, int, int)': main.cpp:51:20: warning: left operand of comma operator has no effect [-Wunused-value] for(i=x2,j=y2;i>=x1,j<=y11;i--,j++) ~^~~~