无符号长整型数转换为字符串

[c]代码库

#include <stdlib.h> 
#include <stdio.h> 

int main( void ) 
{ 
   unsigned long lnumber = 3123456789L; 
   char string[25]; 

   ultoa(lnumber,string,10); 
   printf("string = %s  unsigned long = %lu\n",string,lnumber); 

   return 0; 
}