Borderou de evaluare (job #66826)

Compilare: user.cpp: In function ‘int main()’: user.cpp:95:8: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:42:14: warning: variable ‘l’ set but not used [-Wunused-but-set-variable] user.cpp:44:22: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:56:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:57:19: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:60:19: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:98:30: warning: ‘mid’ may be used uninitialized in this function [-Wuninitialized]