Computer Programming C Laboratory: Unions C Programs

Write a C program to pass an array of structure to a function, and return a pointer to a structure

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C Programs using Structures & Unions

Write a C program to pass an array of structure to a function, and return a pointer to a structure.

Eg: Locate and display a student record, each record will be maintained in a structure.

The basic strategy will be to enter a student number, and then transform array of records to the function called search(). Within the search() function the specified student number will be compared with the student number that is stored within each student record until a match is found, or until the entire list of records has been searched.

If a match is found, a pointer to that array element is returned to main() and the contents of their records are displayed.

/* C Program to pass an array of structure to a function and return a pointer to a structure */

#include <stdio.h>

#define N 3

#define NULL 0

/* Global declarations */

typedef struct

{

int sno;

char* name;

float age;

} record;

void main()

{

/* Local definitions */

static record std[N] ={{15, "MUNI", 28},{16, "LAK",27}, {17, "RAJA",31}

};

int stdno;

record *pt;

record search(record table[], int stdno);

/*Statements */

printf("Student Number Locater");

printf("\nTo exit the program enter 0 for student number");

printf("\nEnter Student Number: ");

scanf("%d", &stdno);

while(stdno!=0)

{

pt = search(std, stdno);

if (pt!= NULL)

{

printf("\nNumber.....%d",pt‒>sno);

printf("\nName.......%d",pt‒>name);

printf("\nAge........%d", pt‒>age);

} /* if */

else

printf("\nNot found...try again");

printf("\nEnter Student Number : ");

scanf("%d", &stdno);

} /* while */

} /* main */

Record *search(record table[], int stdno)

{

int count;

for (count=0; count < N; ++count)

if(table[count].sno==stdno)

return(&table[count]);

return(NULL);

} /* record *search() */

OUTPUT

Student Number Locater

To exit the program enter 0 for student number

Enter Student Number: 15

Number.....15

Name.......MUNI

Age........27

Enter Student Number: 0

EXPLANATION: This program refers to pass an array of structure to a function, and return a pointer to a structure. In the program structure record and static record std[N] is initialised. The program reads the stdno from keyboard, and checks the condition using while loop (stdno!=0). If condition is true then if statement checks the condition pt!=NULL, while the condition is true then statement is printed otherwise else block is executed and prints the block of statement.

Computer Programming C Laboratory: Unions C Programs : Tag: C Programming : - Write a C program to pass an array of structure to a function, and return a pointer to a structure

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Computer Programming C Laboratory: Unions C Programs

C Program to union global declarations

C Program to find size of union and number of bytes reserved for it

C Program to demonstration on pointer to unions

C Program to create user defined data type and use it in the program

C Program to create user-defined datatype from structure

C Program to print variables from memory address

C Program to altering the allocated memory

The colors in the rainbow are enumerated in C Program

Write a program to transfer a structure to a function by passing the structure address (a pointer) to the function

Write a C program to pass an array of structure to a function, and return a pointer to a structure

Write a C program to pass union to a function

Write a C program to print name, and address using structure

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