帮忙把程序改成任意进制都能转换、还有程序的流程图！求解！

#include <stdio.h>
 #include <stdlib.h>
 #include <malloc.h>
 #define MAX 100

typedef struct
 {
      int data[MAX];
      int top;
 }seqstack, *pseqstack;
 pseqstack s;
 //s = (pseqstack)malloc(sizeof(seqstack));

 pseqstack init_seqstack()
 {
      pseqstack s;
      s = (pseqstack)malloc(sizeof(seqstack));
      if(s)
          s ->top = -1;
      return s;
 }

 int empty_seqstack(pseqstack s)
 {
      if(s ->top == -1)
          return 1;
      else
          return 0;
 }

 int input_seqstack(pseqstack s,int x)
 {
      if(s ->top ==MAX - 1)
          return 0;//栈满不能入栈
      else
      {
          s ->top ++;
          s ->data[s ->top] = x;
          return 1;
      }
 }

 int out_seqstack(pseqstack s)
 {
      int x;
      if (empty_seqstack(s)) //栈空不能出栈
          return 0;
      else
      {
          x = s ->data[s ->top];
          s ->top--;
          printf("%d",x);
          return 1;
      }
 }

 int gettop_seqstack(pseqstack s)
 {
      int x;
      if(empty_seqstack(s))
          return 0;
      else
      {
          x = s->data[s ->top];
          return (1);
      }
 }

 int change(int x)
 {
      int n;
      pseqstack s;
      s = (pseqstack)malloc(sizeof(seqstack));
      s->top=-1;         
     
     while(x != 0)
      {
          n = x % n;
          input_seqstack(s,n);
          x = x / n;
      }
      while(s->top>-1)
      {
          out_seqstack(s);//
      }
      putchar('\n');
      return 1;
 }

 int main()
 {
      int n;
      pseqstack s;
      s = (pseqstack)malloc(sizeof(seqstack));
      printf("输入要转化的进制整数:\n");
      scanf("%d",&n);
      //printf("选择你要转换成的进制数:\n");
      change(n);
      return 0;
 }