习题8.18

void convert(int n)
{
 
int i; 
 if ((i=n/10)!=0)
  convert(i);
  putchar(n%10+'0');
}
void main()
{


int number;
printf("\nInput an integer:");
scanf("%d",&number);
printf("Output:");
if (number<0)
{
 
putchar('-');
number=-number;
}
convert(number); 
}