Question

I want to know about the pointer in C and C++ – how does it help in saving memory? I searched but did not get a satisfactory answer. Please help me out.

Answer 1

If you compare the following two pieces of code:

foo() {
    large_struct x;
    bar(x);
}
bar(large_struct x) {
    //do some funny things
}

and

foo() {
    large_struct* x;
    bar(x);
}
bar(large_struct* x) {
    //do some funny things
}

In the first piece, the large struct x is copied in memory, while in the second snippet just a pointer is copied in memory. That are the points, when you can save memory with pointers.