Compilare: user.cpp: In function ‘int main()’: user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(x) && q;i++) ^ user.cpp:40:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(y[k]!=x[i+1] && k<strlen(y))k++; ^ user.cpp:42:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==strlen(y))q=0; ^ user.cpp:45:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(y[k]==x[i+1] && k<strlen(y))k++; ^ user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k>=strlen(y))q=0; ^ user.cpp:54:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i+1<strlen(x) && k+1<strlen(y))k++; ^ user.cpp:54:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i+1<strlen(x) && k+1<strlen(y))k++; ^