Compilare: user.cpp:9:40: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] char sampleString[MAX_LENGHT] = { NULL }; ^ user.cpp:10:41: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] char currentString[MAX_LENGHT] = { NULL }; ^ user.cpp: In function ‘void Read()’: user.cpp:166:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &sampleString[1]); ^ user.cpp:167:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:173:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &currentString[1]); ^