Compilare: user.cpp: In function ‘int main()’: user.cpp:21:15: warning: unused variable ‘k’ [-Wunused-variable] int n, m, k, t, i, j, x, y, s, i_rad, j_rad; ^ user.cpp: In function ‘void precalculare(int)’: user.cpp:54:15: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x, y, s, m; ^ user.cpp:54:18: warning: unused variable ‘y’ [-Wunused-variable] int i, j, x, y, s, m; ^ user.cpp:54:21: warning: variable ‘s’ set but not used [-Wunused-but-set-variable] int i, j, x, y, s, m; ^ user.cpp: In function ‘int main()’: user.cpp:18:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.in","r",stdin); ^ user.cpp:19:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.out","w",stdout); ^ user.cpp:24:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:27:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:29:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&i,&j,&x,&y); ^ user.cpp: In function ‘void precalculare(int)’: user.cpp:60:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[ i ]); ^ user.cpp:54:24: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i, j, x, y, s, m; ^