Borderou de evaluare (job #523282)

Compilare: user.cpp: In function 'int main()': user.cpp:94:10: warning: unused variable 'ch' [-Wunused-variable] user.cpp:91:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function 'char getch(FILE*)': user.cpp:20:62: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result]