The Program in C to insert an array at the beginning of another array is given below:
#include <stdio.h>
int main() {
int n, i, j;
printf("Enter the number of elements in the first array: ");
scanf("%d", &n);
int a[n];
printf("Enter the elements of the first array: ");
for (i = 0; i < n; i++) {
scanf("%d", &a[i]);
}
printf("Enter the number of elements in the second array: ");
scanf("%d", &j);
n += j;
for (i = n-1; i >= j; i--) {
a[i] = a[i-j];
}
printf("Enter the elements of the second array: ");
for (i = 0; i < j; i++) {
scanf("%d", &a[i]);
}
printf("The updated array is: ");
for (i = 0; i < n; i++) {
printf("%d ", a[i]);
}
return 0;
}
Output:
Enter the number of elements in the first array: 3
Enter the elements of the first array: 23
12
44
Enter the number of elements in the second array: 3
Enter the elements of the second array: 45
12
44
The updated array is: 45 12 44 23 12 44
Pro-tips💡
- This program first takes the number of elements in the first array as input, and then declares an array of that size,
a. - Then it reads the elements of the first array using a for loop.
- After that, it prompts the user to enter the number of elements in the second array, and adds that number to the total number of elements in the array.
- Then it uses a for loop to shift all the elements of the first array n2 position to the right.
- After that, it reads the elements of the second array using another for loop and assigns them to the first n2 positions of the array.
- Finally, it prints out the updated array using another for loop.
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