C :

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
    int x,y,a,b;
    scanf( "%d",&x);
    if (x<0)
        x=-x;
    int f,g,c,d,e;
    f=x/1000;
    g=(x-f*1000)/100;
    c=(x-f*1000-g*100)/10;
    d=x-f*1000-g*100-c*10;
    y=d*1000+c*100+g*10+f;
    a=d*10+c;
    b=g*10+f;
    e=pow(a,2)+pow(b,2);
    printf("y=%d\n",y);
    printf("a=%d,b=%d\n",a,b);
    printf("result=%d\n",e);
    return 0;
}