HackerRank C- Array Reversal
Given an array, of size n, reverse it.
Example: If array is arr=[1,2,3,4,5] , after reversing it, the array should be, arr=[5,4,3,2,1]
- #include <stdio.h>
- #include <stdlib.h>
-
- int main()
- {
- int num, *arr,*rev_arr, i,j;
- scanf("%d", &num);
- arr = (int*) malloc(num * sizeof(int));
- rev_arr = (int*) malloc(num * sizeof(int));
- for(i = 0; i < num; i++) {
- scanf("%d", arr + i);
- }
-
- for(i = num-1,j=0; i>=0&&j<num; i--,j++){
- *(rev_arr+j)=*(arr+i);
- }
- for(int i=0;i<num;i++)
- {
- *(arr+i)=*(rev_arr+i);
- printf("%d ",*(arr+i));
- }
- return 0;
- }
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