How to make 9 8 7 6 =24

#include "stdio.h"[br]#include "process.h"[/br]int fun0(int x,int y){return (x+y);}[br]int fun1(int x,int y){return (x-y);}[/br]int fun2(int x,int y){return (x*y);}[br]int fun3(int x,int y){return (x/y);}[/br]int (*assign[4])(int x,int y);[br]void assign_function(void)[/br]{[br]assign[0]=fun0;[/br]assign[1]=fun1;[br]assign[2]=fun2;[/br]assign[3]=fun3;[br]}[/br]//const int data[4]={9,8,7,1};[br]int data[4]={9,8,7,1};[/br]const int fetch[24][4]={[br]{3,2,1,0},{0,3,2,1},{1,0,3,2},{2,1,0,3},[/br]{3,1,2,0},{0,3,1,2},{2,0,3,1},{1,2,0,3},[br]{3,0,1,2},{2,3,0,1},{1,2,3,0},{0,1,2,3},[/br]{3,2,0,1},{1,3,2,0},{0,1,3,2},{2,0,1,3},[br]{3,0,1,2},{1,3,0,2},{2,1,3,0},{0,2,1,3},[/br]{3,1,0,2},{2,3,1,0},{0,2,3,1},{1,0,2,3}};[br]int calculator[4];[/br]void result(int x,int y,int r,int n)[br]{[/br]int a[4],b[4];[br]char  fomular[20],o[4]={'+','-','*','/'};[/br]for(int i=0;i<4;i++)[br]{[/br]a[i]=fetch[x][i];[br]b[i]=data[fetch[y][i]];//printf("a[%d]:%d  b[%d]:%d  o[%d]:%c  o[a[%d]]:%c\n",i,a[i],i,b[i],i,o[i],i,o[a[i]]);[br]}[/br]if((a[0]==0||a[0]==1)&&(a[1]==2||a[1]==3))[/br]   sprintf(fomular,"Method %d:  (%d%c%d)%c%d%c%d=%d\n",n,b[0],o[a[0]],b[1],o[a[1]],b[2],o[a[2]],b[3],r);[br]else if((a[0]==2||a[0]==3)&&(a[3]!=2||a[3]!=3))[/br]   sprintf(fomular,"Method %d:  %d%c%d%c%d%c%d=%d\n",n,b[0],o[a[0]],b[1],o[a[1]],b[2],o[a[2]],b[3],r);[br]else sprintf(fomular,"Method %d:  (%d%c%d%c%d)%c%d=%d\n",n,b[0],o[a[0]],b[1],o[a[1]],b[2],o[a[2]],b[3],r);[/br]//printf("\tResult:\n");[br]printf("\t%s",fomular);[/br][br]}[/br][br]void main(void)[/br]{  int r=24;[br]   //int temp;[/br]   int n=0;[br]assign_function();[/br]printf("\t\tAchieve 24 point\n\n\tBy Lucifer Star\n\tSingle Studio\n\t\tEMAIL:LetMeGetOne@hotmail.com\n\n");[br]printf("*****************************************\n");[/br]printf("\tPlease input 1st number:");[br]scanf("%d",&data[0]);[/br]printf("\tPlease input 2nd number:");[br]scanf("%d",&data[1]);[/br]printf("\tPlease input 3rd number:");[br]scanf("%d",&data[2]);[/br]printf("\tPlease input 4th number:");[br]scanf("%d",&data[3]);[/br]printf("\tWhat do you want to achieve(default:24):");[br]scanf("%d",&r);[/br]//scanf("%d",&temp);[br]//temp=getch();[/br]//if(temp!=0x0d) r=temp;[br][/br]printf("\n     ***********************************\n");[br]if(data[0]==0||data[1]==0||data[2]==0||data[3]==0) {printf("The 4 numbers shouldn't be 0！");exit(0);}[/br]for(int ii=0;ii<24;ii++)[br]{[/br]   for(int i=0;i<24;i++)[br]   {[/br]    int z=0;[br]    for(int j=0;j<4;j++)[/br]    {[br]  calculator[j]=data[fetch[i][j]];[/br]    }[br]    for(int k=0;k<3;k++)[/br]    {[br]  if(k==0)[/br]  {[br]     if(calculator[0]%calculator[1]!=0&&fetch[ii][0]==3)[/br]        {z=0;break;}[br]     else z=assign[fetch[ii][k]](calculator[k],calculator[k+1]);[/br]  }[br]  else[/br]  {  if(fetch[ii][k]==3)[br]       if(calculator[k+1]==0||z==0||(z%calculator[k+1])!=0)[/br]      {z=0;break;}[br]     z=assign[fetch[ii][k]](z,calculator[k+1]);[/br]  }[br]    }[/br]    if(z==r)[br]    {    n++;result(ii,i,r,n);   }[/br]    }[br]}[/br]printf("\n******************************************\n");[br]if(n==0) printf("Sorry,it's unable to do so!");[/br]else printf("Thanks for using my software!");
}