Borderou de evaluare (job #57607)

Compilare: user.cpp: In function ‘int main()’: user.cpp:38:12: warning: unused variable ‘num’ [-Wunused-variable] user.cpp:38:20: warning: unused variable ‘first’ [-Wunused-variable] user.cpp:38:26: warning: unused variable ‘last’ [-Wunused-variable] user.cpp:39:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:40:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:43:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:48:22: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] /tmp/ccpFuG9w.o: In function `main': user.cpp:(.text.startup+0x92): warning: the `gets' function is dangerous and should not be used.