Compilare: user.cpp: In function ‘int main()’: user.cpp:18:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(a); i++) { ^ user.cpp:30:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(b); i++) { ^ user.cpp:14:39: 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:15:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %s", a, b); ^