sub.cpp: In function 'void addWord(int, char*, node**)': sub.cpp:31: warning: comparison between signed and unsigned integer expressions sub.cpp:41: warning: comparison between signed and unsigned integer expressions sub.cpp: In function 'void deleteWord(int, char*, node**)': sub.cpp:54: warning: comparison between signed and unsigned integer expressions sub.cpp: In function 'int getWordCount(int, char*, node**)': sub.cpp:71: warning: comparison between signed and unsigned integer expressions sub.cpp: In function 'void getMaxLenPrefix(int, char*, node**)': sub.cpp:92: warning: comparison between signed and unsigned integer expressions sub.cpp: In function 'int main()': sub.cpp:104: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sub.cpp:105: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sub.cpp:114: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result sub.cpp: In function 'int getWordCount(int, char*, node**)': sub.cpp:75: warning: control reaches end of non-void function