Viewing memory leaks in Xcode Instruments

Question

I am new to Xcode Instruments. How can I see a simple memory leak difference in the following 2 programs by using the Leak template :

int main()
{
    int* pp =  new int[50000000];
    for(int i =0;i<50000000;i++){
        pp[i] = i;
    }
}

int main()
{
    int* pp = new int[1];
    pp[0] = 10;
}