Where is the wrong?

Question

#include <stdio.h>
#include <math.h>
main()
{
int a,b,c,d,f,g;
printf ("请输入一个四位数\n");
scanf("%d",&a);
a=fabs(a);
b=a/1000;
c=(a-b*1000)/100;
d=(a-b*1000c-c*100)/10;
f=(a%10);
g=f*1000+d*100+c*10+b;
printf("逆序数是%d",g);
}

Answer 1

Where are you trying to run this code on?

If you are trying to run it on Code Playground, Code Playground doesn't support C language.

Answer 2

True of Hatsy Rei!
And d = (a-b*1000-c*100)/10;

Answer 3

Thanks

Answer 4

the chinese.

Answer 5

where are you from?