Answer each of the following:
- The _____ operator returns the location in memory where its operand is stored.
- The _____ operator returns the value of the object to which its operand points.
- To accomplish pass-by-reference when passing a nonarray variable to a function, it’s necessary to pass the _____ of the variable to the function.
(a)
To find the name of the operator that returns the memory location of an operand.
& operator.
Explanation of Solution
In C programming, language and symbol are used to get the address of an operand. The symbol (&) is also known as the ‘Address of’ operator.
Sample Program:
//include essential header files #include <stdio.h> //main function intmain() { //declare an operand int sample; //Print the address of operand named sample printf("%p",&sample); return0; }
Sample output:
(b)
To find the name of the operator that returns the value of an object who points to other operands.
* operator.
Explanation of Solution
In C programming language, * symbol is used to get the value of other operands that address it points.
Sample Program:
//include essential header files #include <stdio.h> //main function intmain() { //declare a operand int sample =10; //declare a pointer type operand int*point; point =&sample; //Print the value printf("%d",*point); return0; }
Sample output:
(c)
To find the component of a variable that should be passed to a function to accomplish pass by reference.
address.
Explanation of Solution
In pass by reference, any changes that a function performs on the passed variable always gets reflected in the actual variable. For this to accomplish, the address of the variable must be passed to function.
Sample Program:
//include essential header files #include <stdio.h> //function defination void passRef(int*a,int*b) { //declare a temp variable int temp; //assign variable a value to temp variable temp =*a; //assign variable b value to variable a *a =*b; //assign variable temp value to variable b *b = temp; //return the value return; } //main function intmain() { //declare variable int sample1 =10; int sample2 =15; //calling function using address of sample1 and sample2 passRef(&sample1,&sample2); //Print the values after swapping printf("sample1 = %d sample2 = %d", sample1, sample2); return0; }
Sample output:
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