CODEWITHSUNDEEP
c++arrayspointersreferenceiteration
G Y
G Y

Reputation: 21

Searching an array and returning a pointer to a single element

I'm trying to write some functions to handle C++ arrays (for the purposes of this assignment, I'm not allowed to use std::vector - only iostream, algorithm, string, and array).

However, when I run this code, I get two error messages.

in.cpp:15:25: error: cannot convert ‘int ()[5]’ to ‘int’ in initialization int* PointsToArray = &myArray;

This happens when I try to initialize a pointer to myArray. I guess there must be an issue with my pointer/reference declaration syntax, but I've tried "int *PointsToArray" and "int * PointsToArray" and various other ways of spacing around the asterisk, and I can't figure out what's wrong.

The other one is this.

main.cpp:22:15: error: ‘arr’, 'begin', 'end' was not declared in this scope for(int i : arr)

I borrowed the for(int i : arr) syntax in order to iterate through an array with an unknown number of elements from here. The loop worked fine until I added the searchPointer() function; then it threw this error message.

My code is below, please help.

#include <iostream>
#include <array>
using namespace std;

int searchArray(int array[], int targetInt);
//Iterates through an array & returns index of an element identical to target

int* searchPointer(int* arr, int targetInt);
//Returns a pointer to an element that matches the target

int main() {
  int targetInt = 4;
  int myArray[5] = {1, 2, 3, 4, 5};
  int* PointsToArray = &myArray;

  searchArray(myArray, targetInt);
  searchPointer(PointsToArray, targetInt);
 }

int searchArray(int array[], int targetInt) {
  for(int i : arr) {
    if (i == targetInt) {
      int* x = find (std::begin(arr), std::end(arr), targetInt);
      cout << "Your target " << targetInt << " found at index " << x << "\n";
    }
  }
  return 0;
}

int* searchPointer(int* arr, int targetInt) {
  for (int i : arr) {
    if (i == targetInt) {
      std::cout << "Target located at " << &targetInt << " in memory\n";
    }
  }
}

Upvotes: 0

Views: 948

Answers (1)

Rehab Reda
Rehab Reda

Reputation: 193

the name of the array is the address of the first element i think u have to write it like this

int* PointsToArray = myArray;

Upvotes: 0

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