Compilare: user.cpp: In function ‘int lee_initia(int, int)’: user.cpp:20:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int lee(int, int, int, int, int, int, int)’: user.cpp:25:30: warning: unused variable ‘j’ [-Wunused-variable] int x_aa, y_aa, s, k, i, j; ^ user.cpp: In function ‘int dragoni(int, int, int, int)’: user.cpp:62:21: warning: unused variable ‘ma’ [-Wunused-variable] int x_aa, y_aa, ma, s, k, i; ^ user.cpp:83:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:91:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in","r",stdin); ^ user.cpp:92:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ user.cpp:97:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:104:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%*c"); ^ user.cpp:106:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&x); ^ user.cpp:153:48: warning: ‘y_s’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( lee( n, m, x_i, y_i, x_s, y_s, mid ) ){ ^ user.cpp:153:48: warning: ‘y_i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:153:48: warning: ‘x_s’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:153:48: warning: ‘x_i’ may be used uninitialized in this function [-Wmaybe-uninitialized]