Question

How to enter input number into an array in C

Answer 1

#include <stdio.h> 
#include <math.h> 

int countdigits(int n);

int main(void)
{   
    int arr[10] = {0}, n, e;
 
    printf("Enter a number: ");
    scanf("%d",&n);
     
    int size = countdigits(n);
 
     for (int i = size - 1, j = 0; i >=0; i--, j++)
     {
          e = pow(10, i);
          arr[j] = n/e;
          n = n%e;
     }
     for (int i = 0;i < size; i++)
         printf("%d", arr[i]);
         
    return 0;
}

int countdigits(int n)
{
    int count = 0;
 
    while (n != 0)
    {
        n /= 10;
        count++;
    }
     
    return count;
}

 
/*
run:
   
Enter a number: 12345
12345

*/

 

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