Compilare: user.c: In function ‘finite_automata’: user.c:91:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] s = trans[s][Text[i]]; ^ user.c: In function ‘bad_char’: user.c:179:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] BC[Pattern[i - 1]][i] = i - 1; ^ user.c: In function ‘boyer_moore’: user.c:198:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (BC[Text[i]][j] == -1) ^ user.c:201:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] i += BC[Text[i]][j]; ^ user.c: At top level: user.c:34:12: warning: ‘rabin_karp’ defined but not used [-Wunused-function] static int rabin_karp(size_t tlen, size_t plen) ^ user.c:83:12: warning: ‘finite_automata’ defined but not used [-Wunused-function] static int finite_automata(size_t tlen, size_t plen) ^ user.c:114:12: warning: ‘kmp’ defined but not used [-Wunused-function] static int kmp(size_t tlen, size_t plen) ^ user.c:134:12: warning: ‘z_algorithm’ defined but not used [-Wunused-function] static int z_algorithm(size_t tlen, size_t plen) ^ user.c: In function ‘main’: user.c:212:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "r", stdin); ^ user.c:213:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^ user.c:216:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %s", Pattern, Text); ^