How to input two arrays in c++

The methods of inputting two arrays in C are: input element by element: use a for loop to read the array elements one by one. Row input: Read the entire row of data and split it into an array. fill_n function: fills the array elements with the specified value. iota function: fills continuous values ​​into an array.

How to input two arrays in C

Direct input method

• for loop: Use the for loop to input the elements in the two arrays one by one.

<code class="cpp">int main() {
  int arr1[5], arr2[5];
  cout << "Enter elements for arr1: ";
  for (int i = 0; i < 5; i++) {
    cin >> arr1[i];
  }
  cout << "Enter elements for arr2: ";
  for (int i = 0; i < 5; i++) {
    cin >> arr2[i];
  }
  return 0;
}</code>

• getline: Use the getline function to read the entire line and then split the elements into an array.

<code class="cpp">int main() {
  int arr1[5], arr2[5];
  string line1, line2;
  cout << "Enter elements for arr1: ";
  getline(cin, line1);
  cout << "Enter elements for arr2: ";
  getline(cin, line2);
  istringstream iss1(line1);
  istringstream iss2(line2);
  for (int i = 0; i < 5; i++) {
    iss1 >> arr1[i];
    iss2 >> arr2[i];
  }
  return 0;
}</code>

Function input method

• fill_n: Use the fill_n function to fill the array with the specified value.

<code class="cpp">int main() {
  int arr1[5], arr2[5];
  fill_n(arr1, 5, 0);  // 初始化 arr1 为 0
  fill_n(arr2, 5, 1);  // 初始化 arr2 为 1
  return 0;
}</code>

• iota: Use the iota function to fill consecutive values ​​into an array.

<code class="cpp">int main() {
  int arr1[5], arr2[5];
  iota(arr1, arr1 + 5, 1);  // 将 1-5 填充到 arr1
  iota(arr2, arr2 + 5, 6);  // 将 6-10 填充到 arr2
  return 0;
}</code>

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