Compilare: user.cpp: In function ‘int main()’: user.cpp:62:8: warning: unused variable ‘p1’ [-Wunused-variable] char *p1, *p2; ^ user.cpp:62:13: warning: unused variable ‘p2’ [-Wunused-variable] char *p1, *p2; ^ user.cpp:59:36: 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:60:38: 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); ^ user.cpp:63:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %s", str1, str2); ^