Borderou de evaluare (job #23325)

Compilare: user.cpp: In function ‘void write()’: user.cpp:11:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:12:29: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:13:30: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:14:21: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:15:22: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:16:21: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp: In function ‘int main()’: user.cpp:173:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:174:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:176:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:178:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]