hiiiii :)

i am new here i hope to get enough help to finish my simple project.

i am working on a simple program to show the union and intersection

between 2 sets. i program it the intersection is working good but the union is not working!!!

i am DIEING i try many things but

still the same problem happening " union is not working " :icon_sad: .

this is the code of my program can someone help me!! i have to finish it in 3 days:

```
#include<iostream.h>
int main()
{
int A[4],B[4],C[4],U[8];
int i,j,k,x;
int flag=0;
cout<<"enter a[4]:\n";
for(i=0;i<4;i++)
cin>>A[i];
cout<<"enter B[4]:\n";
for(i=0;i<4;i++)
cin>>B[i];
{ //start the intesection
k=0;
for(i=0;i<4;i++)
for(j=0;j<4;j++)
if(A[i]== B[j])
{
C[k]=A[i];
k++;
}
cout<<" a intesection b is : \n";
cout<<"{";
for(i=0; i<k; i++)
{
cout<< C[i]<<" ,";
}
cout<<"}";
}//end the intersection
{//union
for(x=0;x<i;i++)
{
U[x]=A[i];
}
for (int i = 0; i <4; i++) {
for (int j = 0; j <8; j++) {
if (B[i] == U[j])
{
U[j] == B[i];
flag=1;
j++;
}
if (flag =! 1)
{
U[j] = B[i];
flag = 0;
}
cout << "\nUnion of Set A and Set B is ";
for (int i = 0; i <8; i++) {
cout << U[i] << " ";
}
}
}
}
return (0);
}//main
```

---------------------

and then i try to write a program for only union and i find a very good programe i change some values , but it not working correctly :'(

```
#include<iostream.h>
main()
{
int inputArraySetA[4];
int inputArraySetB[4];
int inputArrayUnion[8];
int sizeSetA = 4;
int sizeSetB = 4;
int sizeUnion = 8;
int temp = 0;
int i,j;
cout << "Input the numbers for Set A. To signify the end of the set type 0\n";
// I am using the 0 to signify the end of the set, you may want to use -1 or something similar if the set can contain 0.
for (i = 0; i < 4; i++) {
cin >> temp;
if (temp == 0) { // Change this to if (temp == -1) if using -1 to signify end of input.
break;
} else {
inputArraySetA[i] = temp;
sizeSetA++;
}
}
// This will file the first set into an array. Sets the size of the array.
cout << "Input the numbers for Set B. To signify the end of the set type 0\n";
// Again, I am using the 0 to signify the end of the set, you may want to use -1 or something similar if the set can contain 0.
for ( i = 0; i < 4; i++) {
cin >> temp;
if (temp == 0) {
break;
} else {
inputArraySetB[i] = temp;
sizeSetB++;
}
}
// This will file the second set into an array. Sets the size of the array.
// To check for duplicates, first place all of inputSetA into inputArrayUnion
for (i = 0; i < sizeSetA; i++) {
inputArrayUnion[i] = inputArraySetA[i];
}
sizeUnion = sizeSetA;
// The above assumes inputSetA does not contain any duplicates.
// Now add the elements from inputArraySetB that are not equal to inputArrayUnion (which is the same as inputArraySetA).
for ( i = 0; i < sizeSetB; i++) {
for ( j = 0; j < sizeUnion; j++) {
if (inputArraySetB[i] != inputArrayUnion[j]) {
inputArrayUnion[sizeUnion] = inputArraySetB[i];
sizeUnion++;
}
}
}
// Then to print them out.
cout << "\nUnion of Set A and Set B is ";
for (i = 0; i < 8; i++) {
cout << inputArrayUnion[i] << " ";
}
return(0);
}
```

-------------------

sOOOOOOOO

CAN SOMEONE HELP ME :?: