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Trying to debug this code, where given a vector {1,2}, it should print out {1,2,2,4}. However, I’m getting an infinte loop.
Here is the code:
#include <iostream>
#include <vector>
using namespace std;
void Add_Doubles(vector<int> & A){
for (int i=0; i< A.size(); i++)
A.push_back(2*A[i]);
}
void print (const vector<int> & A){
for (int i=0; i<A.size(); i++)
cout << A[i] <<" ";
cout << endl;
}
int main(){
vector<int> A;
A.push_back(1);
A.push_back(2);
Add_Doubles(A);
print(A);
Add_Doubles(A);
print(A);
return 0;
}
I feel that it’s the for loop not exiting, but it might be something else. Any pointers would help!
Answer
When you push_back a new integer to A, its size increases. That means you’ll never reach the end of your loop. I suggest you store the initial size of it in an another integer like so:
int myVecSize = A.size();
and then compare that with i.
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