index.cpp: In function 'void AddInList(Nod**, Nod**, char*, int)': index.cpp:26: warning: unused variable 'found' index.cpp: In function 'void ReadDoc(int&)': index.cpp:67: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result index.cpp: In function 'void PrintWords(Nod*)': index.cpp:128: warning: unused variable 'k' index.cpp: In function 'void WordSeparation(int)': index.cpp:170: warning: NULL used in arithmetic index.cpp: In function 'void Indexing()': index.cpp:182: warning: unused variable 'pag' index.cpp:182: warning: unused variable 'i' index.cpp:182: warning: unused variable 'index_done' index.cpp:183: warning: unused variable 'line' index.cpp:184: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result