Compilare: user.cpp: In function ‘int main()’: user.cpp:33: warning: name lookup of ‘i’ changed user.cpp:7: warning: matches this ‘i’ under ISO standard rules user.cpp:29: warning: matches this ‘i’ under old rules user.cpp:14: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:15: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:23: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result /tmp/ccjM8lkv.o: In function `main': user.cpp:(.text+0x7d): warning: the `gets' function is dangerous and should not be used.