Compilare: main.cpp: In function 'int main()': main.cpp:29:23: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] s[strlen(s3+1)+2]=NULL; ^~~~ main.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=n; i>=strlen(s3+1); i--) ~^~~~~~~~~~~~~~ main.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=n; i>=strlen(s3+1); i--) ~^~~~~~~~~~~~~~ main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i>=strlen(s3+1) && s[i]==s2[j]){ ~^~~~~~~~~~~~~~ main.cpp:17:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("potriveala.in", "r",stdin); ^ main.cpp:18:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.out", "w",stdout); ^ main.cpp:20:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s1+1); ^ main.cpp:21:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s2+1); ^