pointer
Variable is used to store value
Pointer is used to store addresss of valuepointer
Variable is used to store value
Pointer is used to store addresss of valuepointer
/*
**use of pointers is that here even if we change the value of c since the adderss is
* of c is assigned to pc it *pc will also get modified*/
int* pc, c;
c = 5;
pc = &c;
*pc = 1;
printf("%d", *pc); // Ouptut: 1
printf("%d", c); // Output: 1pointer
As discussed earlier, 'p' is a pointer to 'a'. Since 'a' has a value of 10, so '*p' is 10. 'p' stores the address of a. So the output p = 0xffff377c implies that 0xffff377c is the address of 'a'. '&p' represents the address of 'p' which is 0xffff3778. Now, '*&p' is the value of '&p' and the value of '&p' is the address of 'a'. So, it is 0xffff377c.pointer
#include <iostream>
float average(float a[])
{
int i;
float avg, sum=0;
for(i=0;i<8;++i)
{
sum+= a[i];
}
avg = sum/8;
return avg;
}
int main(){
float b, n[ ] = { 20.6, 30.8, 5.1, 67.2, 23, 2.9, 4, 8 };
b = average(n);
std:: cout << "Average of numbers = " << b << std::endl;
return 0;
}pointer
#include <iostream>
// by using increment sign we know whole array
int main()
{
using namespace std;
int ar[] = { 1,2,3,4,5,6,7,8,9,10 };
for (int m : ar)
{
cout << m << endl;
}
return 0;
}pointer
p = 0xffff377c
*p = 10
&p = 0xffff3778
*&p = 0xffff377cpointer
Size of arr[] 24
Size of ptr 4Copyright © 2021 Codeinu
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