#include<iostream>
#include<cmath>
#include<cstdlib>
#include <graphics.h>
#include <conio.h>
#include<time.h>
#include<stdio.h>
#include<math.h>
void main()
{ initgraph(5000, 5000); srand((int)time(0));
int j,n,x,y;
int aj_x,aj_y,bj_x,bj_y,cj_x,cj_y;
int d1,d2,d3;int r = rand() % 500+ 300;
char s[10],a1[20],b1[20],c1[20],a2[20],b2[20],c2[20],m[10];
sprintf(s, "%d", r);
setaspectratio(0.25,0.25);
outtextxy(3770,1910,s);
setaspectratio(0.25,0.25);
for(x=700;x<=4100;x=x+r)
for(y=1300;y<=1800;y=y++)
putpixel(x,y,YELLOW);
setaspectratio(0.25,0.25);
rectangle(800,1645,r,1540);
setlinecolor(GREEN);
setlinestyle(PS_DASHDOT,NULL,5);
rectangle(700,1465,4100,1675);
int max=3200/r+1;
sprintf(m, "%d", max);
outtextxy(3770,2000,m);
{for(j=0;j<=max;n=800+j*r,j++)
{do{srand(time(NULL));
aj_x=rand()%r+n;
bj_x=rand()%r+n;
cj_x=rand()%r+n;
aj_y=rand()%75+1465;
bj_y=rand()%75+1465;
cj_y=rand()%75+1465;
d1=sqrt((aj_x-bj_x)^2+(aj_y-bj_y)^2);
d2=sqrt((aj_x-cj_x)^2+(aj_y-cj_y)^2);
d3=sqrt((bj_x-cj_x)^2+(bj_y-cj_y)^2);}
while(d1<=50||d2<=50||d3<=50);
putpixel(aj_x,aj_y,RED);
putpixel(bj_x,bj_y,RED);
putpixel(cj_x,cj_y,RED);
sprintf(a1,"%d",aj_x);
sprintf(a2,"%d",aj_y);
sprintf(b1,"%d",bj_x);
sprintf(b2,"%d",bj_y);
sprintf(c1,"%d",cj_x);
sprintf(c2,"%d",cj_y);
outtextxy(200,200,a1);
outtextxy(400,200,a2);
outtextxy(200,200*j,b1);
outtextxy(400,200*j,b2);
outtextxy(200,200*(j+1),c1);
outtextxy(400,200*(j+1),c2);}}
getch();
closegraph();}

应该是do while语句的问题，不能执行下面的代码，我感觉应该是while要改成if
随便说说阿，因为问题没看懂。。。。。。

你大概想得到什么样的结果？

#include<iostream>
#include<cmath>
#include<cstdlib>
#include <graphics.h>
#include <conio.h>
#include<time.h>
#include<stdio.h>
#include<math.h>
void main()
{ initgraph(5000, 5000); srand((int)time(0));
int j,n,x,y;
int aj_x,aj_y,bj_x,bj_y,cj_x,cj_y;
int d1,d2,d3;
int r = rand() % 500+ 300;
char s[10],a1[20],b1[20],c1[20],a2[20],b2[20],c2[20],m[10];
sprintf(s, "%d", r);
setaspectratio(0.25,0.25);
outtextxy(3770,1910,s);
setaspectratio(0.25,0.25);
for(x=700;x<=4100;x=x+r)
for(y=1300;y<=1800;y=y++)
putpixel(x,y,YELLOW);
setlinecolor(GREEN);
setlinestyle(PS_DASHDOT,NULL,5);
rectangle(700,1465,4100,1675);
int max=3200/r;
sprintf(m, "%d", max);
outtextxy(3770,2000,m);
{for(j=0;j<=max;n=700+j*r)
{srand(time(0));
aj_x=rand()%r+n;
bj_x=rand()%r+n;
cj_x=rand()%r+n;
aj_y=rand()%75+1465;
bj_y=rand()%75+1465;
cj_y=rand()%75+1465;
d1=sqrt((aj_x-bj_x)^2+(aj_y-bj_y)^2);
d2=sqrt((aj_x-cj_x)^2+(aj_y-cj_y)^2);
d3=sqrt((bj_x-cj_x)^2+(bj_y-cj_y)^2);
if(d1>50&&d2>50&&d3>50);
j++;
putpixel(aj_x,aj_y,RED);
putpixel(bj_x,bj_y,RED);
putpixel(cj_x,cj_y,RED);
sprintf(a1,"%d",aj_x);
sprintf(a2,"%d",aj_y);
sprintf(b1,"%d",bj_x);
sprintf(b2,"%d",bj_y);
sprintf(c1,"%d",cj_x);
sprintf(c2,"%d",cj_y);
outtextxy(200,200,a1);
outtextxy(400,200,a2);
outtextxy(200,200*j,b1);
outtextxy(400,200*j,b2);
outtextxy(200,200*(j+1),c1);
outtextxy(400,200*(j+1),c2);}}
getch();
closegraph();}

lz
[无效] ，程序改好了
你的那个if(d1>50&&d2>50&&d3>50);是完全不起作用的，判断完跟个空语句？
还有for前面的大括号是什么意思？
我大概是这么做的：
先随机点1
再随机点2，同时判断点1与点2的距离（不足50，重新随机；大于50，跳出循环）
再随机点3的坐标，再判断点3与其他点的距离（不足50，重新随机；大于50，跳出循环）
3个点都确定之后，再操作下一个分区
以此类推.....
麻烦lz以后多写点注释，稍微写一点，总比没有强
坑爹百度吞格式，只有发网盘链接了
http://pan.baidu.com/share/link?shareid=475155&uk=420543002