函数名: ultoa
功 能: 转换一个无符号长整型数为字符串
用 法: #include <stdlib.h>
char *ultoa(unsigned long value, char *string, int radix);
程序例:
#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;
}