Compilare: user.cpp: In function ‘int main()’: user.cpp:59:7: warning: unused variable ‘rez’ [-Wunused-variable] int rez = 0, x = 0, y = 0; ^ user.cpp: In function ‘char readch()’: user.cpp:18:26: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, BUFF, 1, in); ^