ch27-3.c

C语言程序设计上机指导与练习 冶金工业出版社 刘怀亮

#include<conio.h> 
#include<stdio.h> 

void convert(int n) 
{ 
   int i; 
   if((i=n/10)!=0) convert(i); 
   putchar(n%10+'0'); /*the ASCII of char '0' is 48*/
} 

void main() 
{ 
   int number; 
   clrscr(); 
   printf("\ninput an integer:"); 
   scanf("%d",&number); 
   printf("\n\nOutput string is : "); 
   if(number<0) 
   { 
      putchar('-'); 
      number=-number; 
   } 
   convert(number); 
   getch(); 
}