Compilare: user.cpp: In function ‘int main()’: user.cpp:17:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i<strlen(v_b)-strlen(v_a)+1; ++i) ^ user.cpp:27:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( cnt < strlen(v_a) && v_a[cnt] == v_b[j]) ^ user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( cnt == strlen(v_a) ) ^ user.cpp:16:9: warning: unused variable ‘pozitie’ [-Wunused-variable] int pozitie = 0, cnt, nr = 0; ^ user.cpp:12:40: 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:13:42: 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); ^