Compilare: user.cpp: In function ‘int lee(int, int)’: user.cpp:17:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, s, d, k, x_aa, y_aa; ^ user.cpp:17:21: warning: unused variable ‘k’ [-Wunused-variable] int i, j, s, d, k, x_aa, y_aa; ^ user.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void back_lee(int, int)’: user.cpp:54:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] x_aa = x - x_a[vv[x][y]]; ^ user.cpp:55:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] y_aa = y - y_a[vv[x][y]]; ^ user.cpp: In function ‘int main()’: user.cpp:84:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:84:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:84:27: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:84:30: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:81:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drum6.in","r",stdin); ^ user.cpp:82:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drum6.out","w",stdout); ^ user.cpp:86:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%*c",&n,&m); ^ user.cpp:88:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( j = 1; j <= m; ++j ) scanf("%c",&q[i][j]); ^ user.cpp:89:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%*c"); ^