#include "stdio.h"
#include "conio.h"
#include"graphics.h"
#include"math.h"
#include"stdlib.h"
#define M 100
struct
{
    int a[M][2];
    int n;
    int G0[M];
    char argv[1024];
} data1;
int x0,y0,Xm,Ym,dx,dy;
main()
{
    char buf[1024];
    int grahpdriver=DETECT, grahpmode, i;
    printf("Please Input The Way:Such As “F：/b.txt“");
    scanf("%s",data1.argv);      
    sprintf(buf,"edit %s",data1.argv);
    system(buf);
    mycount();
    getch();
    myread();
    getch();
    myread1();
    getch();
    initgraph(&grahpdriver, &grahpmode, "");
    x0=0,y0=0;
    for(i=0; i<data1.n; i++)
    {
        switch(data1.G0[i])
        {
        case 0:
            G00(data1.a[i][0],data1.a[i][1]);
            break;
        case 1:
            G01(data1.a[i][0],data1.a[i][1]);
            break;
        default:
            printf("command unknow error\n");
            system("pause");
            exit(0);
            break;
        }
    }
    free(data1.G0);
    free(data1.a);
    getch();
}
int G00(int x,int y)     
{
    float xt,yt,l,i,n;
    xt=x-x0;
    yt=y-y0;
    l=sqrt(xt*xt+yt*yt);
    n=l/5;
    if(l)xt=5*xt/l;
    else xt=0;
    if(l)yt=5*yt/l;
    else yt=0;
    getch();
    setcolor(GREEN);
    for(i=0; i<n; i++)
        putpixel(x0+i*xt,y0+i*yt,2);
    x0=x,y0=y;
}
int G01(int x,int y)   
{
    float Xi=x0,Yi=y0;
    float Xm=x,Ym=y,l,xt,yt,i;
    xt=Xm-Xi;
    yt=Ym-Yi;
    l=sqrt(xt*xt+yt*yt);
    if(l)xt=1*xt/l,yt=1*yt/l;
    else xt=0,yt=0;
    getch();
    moveto(x0,y0);
    setcolor(GREEN);
    lineto(x,y);
    x0=x,y0=y;
    getch();
    moveto(Xi,Yi);
    for(i=0; i<l; i++)
    {
        putpixel(Xi+i*xt,Yi+i*yt,1);
        delay(5000);
    }
    printf("+");
}
int mycount()     
{
    FILE * FP=NULL;
    char ch;
    int count=0;
    int white=1;
    FP= fopen(data1.argv, "r");
    if(FP==NULL)
    {
        printf("Can not open the file.\n");
        getch();
        exit(0);
    }
    while((ch=fgetc(FP))!=EOF)
        switch(ch)
        {
        case' ':
        case'\t':
        case'\n':
            white++;
            break;
        default  :
            if(white)
            {
                white=0;
                count++;
            }
        }
    fclose(FP);
    data1.n=count/3;
}
int myread()   
{
    int j=0;
    FILE *FP=NULL;
    char string [81];
    FP= fopen(data1.argv, "r");
    if(FP==NULL)
    {
        printf("Can not open the file.\n");
        getch();
        exit(0);
    }
    myread1();
    for(j=0; j<data1.n; j++)
    {
        if(3!=fscanf(FP," G0%d x%d y%d;",
                     &data1.G0[j],
                     &data1.a[j][0],
                     &data1.a[j][1]))break;
    }

    while(fgets(string,81,FP))
        printf("%s",string);
    fclose(FP);
    printf("\ncommand readed:\n");
    for(j=0; j<data1.n; j++)
        printf("G0%d x%d y%d;\n",data1.G0[j],data1.a[j][0],data1.a[j][1]);
    getch();
    return 0;
}
int myread1()      
{   FILE *FP=NULL;
    FP= fopen("C:/Win-TC/a.txt", "r");
    if(FP==NULL)
    { printf("Can not open the file.\n");getch();exit(0);}
      fscanf(FP,"%d", &data1.n);
      fclose(FP);
      return 0;
}
这是我编写的直线插补程序，程序运行结果正常，现在要求在输出的实线上打上“+”号，如何实现？
假如文本文件内容为：
G00 x100 y200;
G01 x326 y326;
G01 x153 y198;
G00 x400 y398;
G01 x350 y256;
G01 x200 y175;

[ 本帖最后由 naturelop 于 2011-6-14 20:51 编辑 ]

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