Compilare: user.cpp: In function ‘void bordare()’: user.cpp:23:67: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(int i = 0; i <= n + 1; ++i) a[i][0] = b[i][0] = a[i][m+1] = b[i][m+1] = -1; ^ user.cpp:23:45: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(int i = 0; i <= n + 1; ++i) a[i][0] = b[i][0] = a[i][m+1] = b[i][m+1] = -1; ^ user.cpp:24:67: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(int i = 0; i <= m + 1; ++i) a[0][i] = b[0][i] = a[n+1][i] = b[m+1][i] = -1; ^ user.cpp:24:45: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(int i = 0; i <= m + 1; ++i) a[0][i] = b[0][i] = a[n+1][i] = b[m+1][i] = -1; ^