Compilare: user.cpp: In function ‘int cmp_(char*, char*)’: user.cpp:19:18: warning: NULL used in arithmetic [-Wpointer-arith] while( a[i]!=NULL && b[i]!=NULL && a[i]==b[i] ) ^ user.cpp:19:32: warning: NULL used in arithmetic [-Wpointer-arith] while( a[i]!=NULL && b[i]!=NULL && a[i]==b[i] ) ^ user.cpp:22:15: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]==NULL && b[i]!=NULL ) ^ user.cpp:22:29: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]==NULL && b[i]!=NULL ) ^ user.cpp:25:19: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]!=NULL && b[i]==NULL ) ^ user.cpp:25:33: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]!=NULL && b[i]==NULL ) ^ user.cpp:28:23: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]==NULL && b[i]==NULL ) ^ user.cpp:28:37: warning: NULL used in arithmetic [-Wpointer-arith] if( a[i]==NULL && b[i]==NULL ) ^ user.cpp: In function ‘int main()’: user.cpp:86:34: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[6]’ [-Wformat=] scanf( "\n%s", &v[i].cuv ); ^ user.cpp:71:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "zimeria.in", "r", stdin ); ^ user.cpp:72:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "zimeria.out", "w", stdout ); ^ user.cpp:77:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d\n", &p, &n ); ^ user.cpp:86:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "\n%s", &v[i].cuv ); ^