Compilare: user.cpp: In function ‘int main()’: user.cpp:12:17: warning: unused variable ‘cc’ [-Wunused-variable] int lc = 1,cc = 1,i, j, n, m, k, ok, dif, cm, cn; ^ user.cpp:12:48: warning: variable ‘cm’ set but not used [-Wunused-but-set-variable] int lc = 1,cc = 1,i, j, n, m, k, ok, dif, cm, cn; ^ user.cpp:12:52: warning: variable ‘cn’ set but not used [-Wunused-but-set-variable] int lc = 1,cc = 1,i, j, n, m, k, ok, dif, cm, cn; ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spirala.in","r",stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spirala.out","w",stdout); ^ user.cpp:14:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:18:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^