将字符串s的所有字符按ASCII值从小到大重新排序后的字符串写如D:\design.dat
#include <stdio.h>
#include <string.h>
void main()
{ FILE *p; char *s="634,.%@\\w|SQ2,c";
int i,j,k,n=strlen(s);
/*
*
*
*
*
*
*/
for(i=0;i<n;i++) fputc(s[i],p);
fclose(p);
}

就是让字符串按ASCII码大小排啊,急用!谢谢!