Compilare: user.cpp: In function ‘void Back(int, int)’: user.cpp:55:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses] used[i][j] = m[i][j] = false ; ^ user.cpp:59:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses] used[i][j] = m[i][j] = false ; ^ user.cpp:63:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses] used[i][j] = m[i][j] = false ; ^ user.cpp:67:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] ok = true ;used[i][j] = m[i][j] = false ; ^ user.cpp:71:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] ok = true ;used[i][j] = m[i][j] = false ; ^ user.cpp:75:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] ok = true ;used[i][j] = m[i][j] = false ; ^ user.cpp:79:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] ok = true ;used[i][j] = m[i][j] = false ; ^ user.cpp:48:12: warning: variable ‘eu’ set but not used [-Wunused-but-set-variable] bool eu; ^