C program to input an array of sequences of integers separated by spaces

Problem Statement

Write a C program that takes space-separated integers as array input.

Sample Examples

enter

1 2 3 4 5

Output

‘Array elements are -’ 1, 2, 3, 4, 5

The Chinese translation of

Explanation

is:

Explanation

The input contains 5 space-separated integers.

enter

99 76 87 54 23 56 878 967 34 34 23

Output

‘Array elements are -’ 99, 76, 87, 54, 23, 56, 878, 967, 34, 34, 23

The Chinese translation of

Explanation

is:

Explanation

The input contains 11 space-separated integers.

method one

In this method, we will store the space-separated integers from the input in a single-dimensional array.

algorithm

• Step 1 − Create an array of specific length. Here, we have created an array of length 100.

• Step 2 - In the input box, we ask the user to enter elements separated by spaces.

• Step 3 - We use the scanf() function to accept integer input and store it at the "current index" index of the array.

• Step 4 - We continue to accept input until the user presses the Enter key or enters a total of 100 elements.

• Step 5 - Loop through the array and print all elements.

Example

#include <stdio.h>
int main(){
   int currentIndex = 0;
   // Initialize an array
   int arr[100];
   printf("Enter maximum 100 numbers and stop\n");
   // Take input, and stop the loop if the user enters a new line or reaches 100 elements
   do{
      // store an array index
      scanf("%d", &arr[currentIndex++]);
   } while (getchar() != '\n' && currentIndex < 100);
   // change the size of the array equal to the number of elements entered.
   arr[currentIndex];
   // Print the array elements
   printf("Array elements are: ");
   for (int i = 0; i < currentIndex; i++) {
      printf("%d, ", arr[i]);
   }
   return 0;
}

Output

Enter maximum 100 numbers and stop
1 2 3 4 5 6 7 8
Array elements are: 1, 2, 3, 4, 5, 6, 7, 8,

• Time complexity - The time complexity of taking N elements from the input is O(N).

• Space Complexity - The space complexity of storing N elements in an array is O(N).

Method 2 (Input the array into a two-dimensional array)

In this approach, we will take space separated integer values ​​as input and store them in a 2D array. We can take space separated integers as input as we did in the first approach and manage array indexes to store elements in a 2D array .

algorithm

• Step 1 − Create a 2D array.

• Step 2 - Use two nested loops to manage the indexing of the 2D array.

• Step 3 - Ask the user to enter array elements separated by spaces.

• Step 4 − Get the element from the input and store it at a specific index position in the 2D array.

• Step 5 - Print a 2D array using two nested loops.

Example

#include <stdio.h>
int main(){
   int currentIndex = 0;
   //    taking input from 2d array
   int array[3][3];
   printf("Enter 9 values for 3x3 array : \n");
   for (int i = 0; i < 3; i++) {
      for (int j = 0; j < 3; j++) {
         scanf("%d", &array[i][j]);
      }
   }
   printf("Array values are : \n");
   //    printing 2d array
   for (int i = 0; i < 3; i++)  {
      printf("\n");
      for (int j = 0; j < 3; j++) {
         printf("%d ", array[i][j]);
      }
   }
   return 0;
}

Output

Enter 9 values for 3x3 array : 
1 2 3 4 5 6 7 8 9
Array values are : 

1 2 3 
4 5 6 
7 8 9

• Time complexity - O(N*M), where N is the total number of rows and M is the total number of columns.

• Space complexity − O(N*M)

in conclusion

We learned to take space-separated integers as input and store them in an array. Additionally, we learned to store input elements separated by spaces in a multidimensional array. The user can take any type of space-separated elements from user input as an array.

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