Compilare: main.cpp: In function 'int main()': main.cpp:52:12: warning: unused variable 'j' [-Wunused-variable] 52 | int i, j, x1, y1, x2, y2, x, y, z, m; | ^ main.cpp:52:15: warning: unused variable 'x1' [-Wunused-variable] 52 | int i, j, x1, y1, x2, y2, x, y, z, m; | ^~ main.cpp:52:19: warning: unused variable 'y1' [-Wunused-variable] 52 | int i, j, x1, y1, x2, y2, x, y, z, m; | ^~ main.cpp:52:23: warning: unused variable 'x2' [-Wunused-variable] 52 | int i, j, x1, y1, x2, y2, x, y, z, m; | ^~ main.cpp:52:27: warning: unused variable 'y2' [-Wunused-variable] 52 | int i, j, x1, y1, x2, y2, x, y, z, m; | ^~