Compilare: user.cpp: In function ‘int main()’: user.cpp:83:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s;i++) ^ user.cpp: In function ‘void parse()’: user.cpp:24:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(p,sizeof(char),lg,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:35:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^