Pointer problem in c++

[Alpha001]

Hey guys i made a programe using pointer.At first it worked well but the problem is when i made a copy of it,the copied problem doesn't work.Can anybody help me to find why this is happening...?

[sasauke]

Could you post your code in here, so we can see what might have went wrong?

[Alpha001]

#include<bits/stdc++.h>
using namespace std;
struct data{
int *p;
int len;
};

///-----------Operator
data uni(data a,data b);
data inter(data a,data b);
void show(vector<int> v);
bool searp(int g,data d);
void dshow(data d);
///---------------Process--------
void Result(vector<char> &ch,vector<data>&vv,data a,data b,data c);
void popd(vector<data>&v);
int alen,blen,clen;
int main(){
data nn,aa,bb,cc,tmp;
int x[67]={1,3,5},*p,y[33]={2,3,4,5,6},z[87]={2,3,4,6,8},*q,top,*r;
char ttt[9]={'a', 'b', 'c', '&', '|'};
vector<char>ccc(ttt,ttt+5);vector<data>dd;
aa.p=x;bb.p=y;aa.len=3;bb.len=5,cc.p=z;cc.len=5;
Result(ccc,dd,aa,bb,cc);
dshow(dd[0]);

}

///--------------Operator----------------------
data uni(data a,data b){
data x;
int len,i,slen;
x.len=0;
slen=(a.len<=b.len)?a.len-1:b.len-1;

x.p=new int;
bool big;
if(a.len>=b.len){
len=a.len;
big=true;
}
else{
len=b.len;
big=false;
}
for(i=0;i<len;i++){
if(i>slen){
if(big){
if(!searp(*(a.p+i),x)){
*(x.p+x.len)=*(a.p+i);
x.len++;
}
}
else {
if(!searp(*(b.p+i),x)){
*(x.p+x.len)=*(b.p+i);
x.len++;
}
}
}
else{
if(!searp(*(a.p+i),x)){
*(x.p+x.len)=*(a.p+i);
x.len++;
}
if(!searp(*(b.p+i),x)){
*(x.p+x.len)=*(b.p+i);
x.len++;
}
}
}
return x;
}
data inter(data a,data b){
data inters;
int len,slen=(a.len<=a.len)?a.len-1:b.len-1,i;
inters.len=0;

inters.p=new int;
bool big;
if(a.len>=b.len){
len=a.len;
big=true;
}
else{
len=b.len;
big=false;
}
for(i=0;i<len;i++){
if(big){
if(searp(*(a.p+i),b)){
*(inters.p+inters.len)=*(a.p+i);
inters.len++;
}
}
else{
if(searp(*(b.p+i),a)){
*(inters.p+inters.len)=*(b.p+i);
inters.len++;
}
}
}
return inters;
}
bool searp(int g,data d){
int i;
for(i=0;i<d.len;i++){
if(*(d.p+i)==g){
return true;
}
}
return false;
}
void dshow(data d){
int i;
for(i=0;i<d.len;i++){
cout<<*(d.p+i)<<" ";
}
}

void Result(vector<char> &ch,vector<data>&vv,data a,data b,data c){
int i,len=ch.size(),tmlen;
data tt;
for(i=0;i<len;i++){
if(isalpha(ch[i])){
if(ch[i]=='a'){
vv.push_back(a);
}
else if(ch[i]=='b'){
vv.push_back(b);
}
else{
vv.push_back(c);
}
}
else{
if(ch[i]=='&'){
tt=inter(vv[vv.size()-1],vv[vv.size()-2]);
popd(vv);
vv.push_back(tt);
}
else if(ch[i]=='|'){
tt=uni(vv[vv.size()-1],vv[vv.size()-2]);
popd(vv);
vv.push_back(tt);
}
}
}///end of for loop
}
void popd(vector<data> &v){
v.pop_back();
v.pop_back();
}