Borderou de evaluare (job #461986)

Compilare: user.cpp: In function ‘int main()’: user.cpp:81:19: warning: unused variable ‘first’ [-Wunused-variable] user.cpp:120:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:43:38: 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 nxt()’: user.cpp:23:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]