Borderou de evaluare (job #296958)

Compilare: user.cpp: In function 'int main()': user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:27:15: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:42:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:8:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:14: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:43:23: warning: 'l1' may be used uninitialized in this function [-Wuninitialized] In file included from /usr/include/stdio.h:934:0, from user.cpp:1: In function 'char* gets(char*)', inlined from 'int main()' at user.cpp:12:14: /usr/include/i386-linux-gnu/bits/stdio2.h:230:28: warning: call to '__gets_warn' declared with attribute warning: please use fgets or getline instead, gets can't specify buffer size [enabled by default] /tmp/ccFXnHVQ.o: In function `main': user.cpp:(.text.startup+0xa8): warning: the `gets' function is dangerous and should not be used.