Compilare: user.cpp: In function ‘int lee(int, int, int, int)’: user.cpp:68:18: warning: unused variable ‘j’ [-Wunused-variable] int s, d, i, j, x_aa, y_aa; ^ user.cpp:96:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:106:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, d, k, t; ^ user.cpp:106:27: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, d, k, t; ^ user.cpp:106:30: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, d, k, t; ^ user.cpp:102:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.in","r",stdin); ^ user.cpp:103:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.out","w",stdout); ^ user.cpp:110:27: 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:113:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&x); ^ user.cpp:126:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%*c"); ^