Compilare: user.cpp: In function ‘void zone(int)’: user.cpp:24:15: warning: unused variable ‘b’ [-Wunused-variable] int i, j, b; ^ user.cpp: In function ‘int main()’: user.cpp:55:22: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x[f]==x[z] && y[f]==y[z]-1 || x[f]==x[z] && y[f]==y[z]+1 || x[f]==x[z]-1 && y[f]==y[z] || x[f]==x[z]+1 && y[f]==y[z]) ^ user.cpp:55:84: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x[f]==x[z] && y[f]==y[z]-1 || x[f]==x[z] && y[f]==y[z]+1 || x[f]==x[z]-1 && y[f]==y[z] || x[f]==x[z]+1 && y[f]==y[z]) ^ user.cpp:55:114: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x[f]==x[z] && y[f]==y[z]-1 || x[f]==x[z] && y[f]==y[z]+1 || x[f]==x[z]-1 && y[f]==y[z] || x[f]==x[z]+1 && y[f]==y[z]) ^ user.cpp:44:33: warning: unused variable ‘i1’ [-Wunused-variable] int k, i, j, s=0, f=1, z=1, i1, j1, q; ^ user.cpp:44:37: warning: unused variable ‘j1’ [-Wunused-variable] int k, i, j, s=0, f=1, z=1, i1, j1, q; ^ user.cpp:82:11: warning: ‘q’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[q]=1; ^