Eroare de compilare: user.cpp: In function ‘void kmp_pref(char*, int*)’: user.cpp:15:19: error: ‘strlen’ was not declared in this scope int l = strlen(w); ^ user.cpp: In function ‘int main()’: user.cpp:35:19: error: ‘strlen’ was not declared in this scope int l = strlen(A); ^ user.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < k; ++ i) ^ user.cpp:31:37: 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:32:39: 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:34:10: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(A); ^ user.cpp:37:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(A + l + 1); ^