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call by reference

#include<stdio.h>
#include<conio.h>
void main()
{ int a=10, b=20; printf("a= %d, b=%d", a,b) ; // a=10, b=20 change(&a,&b); printf("a= %d, b=%d", a,b) ; // a=20, b=40 changed value }
void change(int *a, int *b)
{
*a=(*a)*2;.//change value here
*b=(*b)*2;
}

Output of the above program is as following.

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