Question

Please help folks, I really appreciate!

Complete each of the following C statements by adding an asterisk, ampersand, or subscript wherever needed to make the statement do the job described by the comment. Use these declarations: short s, t; short age[] = { 30, 65, 41, 23 }; short * agep, * maxp; (a) agep = age; // Make agep refer to first age in array (b) s = agep; // Copy value of agep's referent into s. (c) agep = age[]; // Copy 65 into agep's referent. (d) maxp = agep; // Make maxp refer to agep's referent. (e) agep = (age[]+age[])/2; // Store mean of 2nd and last ages in agep's referent. (f) scanf("%hi", age[] ); // Read into third array slot. (g) scanf("%hi", agep ); // Read into agep's referent. (h) printf("%hi", agep); // Print agep's referent. (clearly specify each letter part in your answer)

Answer 1

(a)

agep=age;

No need to change anything because age it self a pointer to the first variable of the array.

here are we are copying that address to the agep. When we try to print it prints the first value.

printf("%d",*agep);//30

(b)

s= *agep;

agep is pointer to the first element of the array. So access that value place asterisk before agep.

Now s have the value 30.

(C)

agep= &age[1];

we konw that agep is a pointer . 65 is at index 1.

So &age[1] will be the address of the value 65.

(d)

maxp=agep;

Both agep and maxp are pointers. So no need to change anything in the statement .

The address in the agep is now also in maxp. Which means maxp also referent to same value as agep.

(e)

agep is pointer and it only stores the address of a variable. It cannot store the value of expression directly. So first we store value in the variable and then pass address of that variable to the pointer.

t=(age[1]+age[3])/2;

agep=&t;

(f)

scanf("%hi",&age[2]);

stores value at address of third element in the array.

(g)

You cannot take user input into the pointer . It gives segmentation fault. First we have pass the address of the variable to it and take input.

aegp=&t;

scanf("%hi",agep);

(h)

printf("%hi",*agep);

use asterisk to print the value in the pointer