Borderou de evaluare (job #505442)

Compilare: user.cpp: In function 'int main()': user.cpp:42:13: warning: unused variable 'k' [-Wunused-variable] user.cpp:40:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:41:37: 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 next_ch()': user.cpp:13:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function 'void get(int&)': user.cpp:25:9: warning: 'ch' may be used uninitialized in this function [-Wuninitialized]