Compilare: user.cpp: In function ‘void prefix(int)’: user.cpp:20:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=2;j<=strlen(C[i]+1);j++) ^ user.cpp: In function ‘void kmp(int)’: user.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=strlen(S+1);j++) ^ user.cpp: In function ‘int main()’: user.cpp:84:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=strlen(C[i]+1);j++) ^ user.cpp:91:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(S+1);i++) ^ user.cpp:94:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(S+1);i++) ^ user.cpp:101:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=strlen(C[j]);i++) ^