Compilare: user.cpp: In function ‘void kmp(char*, char*, int)’: user.cpp:37:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok = 0; ^ user.cpp: In function ‘int main()’: user.cpp:50:18: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> b + 1; ^ user.cpp:53:22: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> a + 1; ^