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// Online C compiler to run C program online
#include <stdio.h>
void reverse(int *ptr,int n){
    for(int i=0;i<(5/2);i++){
        int temp=ptr[i];
        ptr[i]=ptr[n-1];
        ptr[n-1]=temp;
        n--;
    }
     for(int i=0;i<5;i++){
        printf("%d",ptr[i]);
    }
    
}
void main() {
    int arr[5]={1,2,3,4,5};
    int *ptr=arr;
    reverse(ptr,5);
    
}
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