Compilare: user.cpp:17:37: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] char crtString[MAX_LENGTH] = { NULL }; ^ user.cpp:18:40: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] char sampleString[MAX_LENGTH] = { NULL }; ^ user.cpp: In function ‘void Read()’: user.cpp:181:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &crtString[1]); ^ user.cpp:183:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:187:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &crtString[1]); ^