How do you reverse a number without storing it in an array
Ex: 412 should be printed as 214

Question

How do you reverse  a number without storing it in an array
Ex: 412 should be printed as 214

Anonymous · Accepted Answer

int reverse(int n){
    int rev = 0;
    while(n!=0){
        rev = rev*10 + n%10;
        n = n/10;
    }
    
    return rev;
}

yifeng · Answer

int reverse(int n){
if(n==0) return;
int tmp=n%10;
reverse(n/10);
printf("%d",tmp);}

Anonymous · Answer

Arithmetic operations are unnecessary.  If it is required to use an array, have variable i from start and variable j from the end walk towards center of the array and swap content of a[i] and a[j].

Anonymous · Answer

I gave an answer but they told me that I am using un-necessary multiplications and divisions,

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