Average Age Calculation with dynamic structure array

Q : Write a program which asks the user to enter the name and age of persons in his group. The numbers of persons is not known to the user in the beginning of the program. The user keeps on entering the data till the user enters the age as zero. The program finally prints the average

age.

Solution :

#include<stdio.h>

#include<conio.h>

typedef struct stu

{

      char name[20];

      int age;

      struct stu * next;

* Operator Pointer

Pointer is a special type of variable which hold address of a location in memory. * symbol is use to make pointer. You can manipulate any variable data though pointer from other function. Change will be permanent when it been done with pointer because pointer has actual physical location of a variable.

You can manipulate a variable data using pointer. By

• First make a pointer variable
• Assign address of variable to pointer
• Access variable data though * operator

Sum of series

#include<stdio.h>

void main()

{

     int i,j,k=0;

     char sym='+';

     printf("Enter n>> ");

     scanf("%d",&i);

Multiplication Table

#include<stdio.h>

void table(int);

void main()

{

     int i;

     printf("Enter number>> ");

     scanf("%d",&i);

     table(i);