Computer Programming C: UNIT II: Arrays and Strings
Passing Arrays To Functions
C Programming
To process an array in large programs, you have to be able to pass them to the function, we can pass individual elements of our array to function like other variables or an entire array can be passed.
PASSING ARRAYS TO FUNCTIONS
To
process an array in large programs, you have to be able to pass them to the
function, we can pass individual elements of our array to function like other
variables or an entire array can be passed.
An
entire array can be transferred to a function as a parameter. To transfer an
array to a function, the array name is enough without subscripts as an actual
parameter within the function call.
The
corresponding formal parameters are written in the same fashion, and must be
declared as an array in formal parameters declaration.
Syntax:
void fun1(int, int[]);
main()
{
int a[10],n;
…….
fun1(n,a);
………
}
void fun1(x,ar[])
{
int x,ar[10];
…..
….
}
You
can pass individual elements to a function like any other variables, as long as
the array element type matches the function parameter type.
Example 1: Add and
display the results of 5 numbers given from the input using arrays to function
concept.
/* Program to add and display the results of 5 nos. */
#include <stdio.h>
#include <conio.h>
void add(int, int[]);
main()
{
int a[5],i,n = 5;
printf("Enter
5 values");
for(i=1;i<=5;i++)
scanf("%d",
&a[i]);
add(n,a); /* add
is a function with arguments */
} /* main
void(int x,int ar[])
{
int sum=0,i;
for(i=1;i<=5;i++)
sum=sum+ar[i];
printf(Sum is
%d", sum); /*
} /* void */
OUTPUT
Enter 5 values 10 20
30 40 50
Sum is...150
EXPLANATION:
The main function reads the five array elements. The user‒defined function
add() is called with an argument x and array ar[]. The function executes and
calculate the sum and print the sum value.
Example 2: Capture
and store n values into Array and print them.
/* Program to store n values into array */
#include <stdio.h>
#include <conio.h>
void main()
{
int i, a[5]; /*
Local definitions */
for(i = 0;i<2;i++)
a[i]=i;
arr(a); /* function
call */
} /* main */
arr(int a[])
{
int i;
for(i =
0;i<2;i++)
printf("value
in array %d\t",a[i]);
} /* arr() */
OUTPUT:
value in array 0
value in array 1
value in array 2
EXPLANATION:
This program assigns values from 0 to 4 to an integer type array. The contents
of arrays displayed in separate function by sending the array name as an
argument.
Computer Programming C: UNIT II: Arrays and Strings : Tag: Computer Science : C Programming - Passing Arrays To Functions
Computer Programming C: UNIT II: Arrays and Strings
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