c - How to add a Pointer array?

Question

I have to add in this file a pointer that goes thru the array to add a worth. Does someone know how to make/change a array in this.

#include <malloc.h>

int main() {

int nummers;


printf("Hoeveel nummers wilt u gaan invoeren?
");
scanf("%i", &nummers);


int* input = (int*) malloc (sizeof(int)*nummers);


for (int i = 0; i < nummers; ++i) {
    printf("Nummer %d:", i+1);
    scanf("%d", &input[i]);
}

for (int i = 0; i < nummers; ++i) {
    printf("Nummer %d is: %d
", i + 1, input[i]);
}

free(input);
}

Above here is my current code that already works only pointer arrays must be added or changed.

This picture above has to be the end result Apreciate help.

question from:https://stackoverflow.com/questions/65920284/how-to-add-a-pointer-array

Answer 1

Is hard to understand what you mean but probably you ask about pointer arithmetic.

In c language *(pointer + i) === pointer[i] and pointer + i === &pointer[i]so your code using the pointer arithmetic instead of indexes:

int* input = malloc (sizeof(*input)*nummers);

for (int i = 0; i < nummers; ++i) {
    printf("Nummer %d:", i+1);
    scanf("%d", input + i);
}

for (int i = 0; i < nummers; ++i) {
    printf("Nummer %d is: %d
", i + 1, *(input + i));
}

free(input);