#include<stdio.h>

#include <conio.h>

#include <stdlib.h>

#include <string.h>
void main(void)
{
FILE *fp;
int i,n;
double x1[100],y1[100],x2[100],y2[100];
double x11,x22,y11,y22;
char *name,*chat;
if((fp=fopen(c:"key.dxf","w"))==NULL)
{
fprintf(fp,"CANNOT OPEN FILE\n");
exit(1);
}
fscanf(fp,"%s",chat);
if(chat="ENTITIES"||chat="entities")
    for(i=1;i<=2;i++)
    {
    fscanf(fp,"%s",chat);
    if(chat="LINE"||chat="line")
    {
       fscanf(fp,"%s",chat);
       fscanf(fp,"%s",chat);
       fscanf(fp,"%s2d",&n);
       fscanf(fp,"%1f",&x11);
       x1[i]=x11;
       fscanf(fp,"%2d",&n);
       fscanf(fp,"%1f",&y11);
       y1[i]=y11;
       fscanf(fp,"%2d",&n);
       fscanf(fp,"%1f",&y22);
       x2[i]=x22;
       fscanf(fp,"%2d",&n);
       fscanf(fp,"%1f",&y22);
       y2[i]=y22;
       printf("x1=%8.2f y1=%8.2f\n",x1[i],y1[i]);
       printf("x2=%8.2f y2=%8.2f\n",x2[i],y2[i]);
        }
    }
    fscanf(fp,"%s",chat);
    fscanf(fp,"%s",chat);
    if(chat="ENDSEC"||chat="endsec")
        fscanf(fp,"%s",chat);
    if(chat="EOF"||chat="eof")
        exit(1);
    fclose(fp);
 }

第二个错误的左值不知道咋改