Please help by answering as thorough as possible with //comments galore to explain, thank you

This is a great EXAMPLE of a helpful response:

/umList array

int numList[6] = {25, 37, 62, 78, 92, 13};

//here we have declared a pointer name listPtr which is pointing the address of numList array

int *listPtr = numList;

//here we have declared another pointer name as temp which is pointing to listPtr + 2

int *temp = listPtr +2;

//a variable

int num;

//a expression to assign a new value to listPtr

*listPtr = *(listPtr + 1) - *listPtr;

//incrment listPtr by 1

listPtr++;

/um variable assign the value of temp pointer

num = *temp;

//incrment the temp pointer by 1

temp++;

//increment the listPtr by 1

listPtr++;

//listPtr assign the value of temp pointer

*listPtr = *temp;

//temp pointer is assign the value of num

*temp = num;

//list pointer is incremented by 2

listPtr = listPtr + 2;

//listPtr decrment by 1

*listPtr = *(listPtr -1);

//Thanks Everyone