Compilare: user.cpp: In function ‘int main()’: user.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(s);++i){ ~^~~~~~~~~~ user.cpp:34:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=strlen(s);i<strlen(t);++i){ ~^~~~~~~~~~ user.cpp:37:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(hs1=hash1(t1)) ^ user.cpp:21:39: 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); ^ user.cpp:22:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^