#include"math.h"
#include"stdio.h"
#include<stdio.h>
main()
{    
        FILE *fpi;
        FILE *fpo;                      
     
        double c1,c2,c3;            
    
        double rr[7];
        double pp[5]; 
        double tt[5];        
        double tt1[5]; 
                           
        int i,j,k;   i=j=k=0;
     
        printf("Please enter the step: ");
        scanf("%lf",&c3);      

      if((fpi=fopen("E:\\My paper\\datepick\\r21aa.txt","r"))==NULL) 
                                              /*請在“”內輸入要處理的文件*/
         {  printf("Can not open this file!");
            exit(0); } 
      fpo=fopen("E:\\My paper\\datepick\\r21bb.txt","a");           
                                              /*請在“”內輸入存放結果的文件*/
         
          
      fprintf(fpo,"PowH\(kN\) DispH\(mm\) PowV\(kN\) DispV\(mm\)  Time\(s\)\n"); 
  
      while(fscanf(fpi,"%lf%lf%lf%lf%lf%lf%lf",&rr[0],&rr[1],&rr[2],&rr[3],&rr[4],&rr[5],&rr[6])>0)        
         { k++;
           tt[0]=rr[0];
           tt[1]=(rr[1]+rr[2])/2;
           tt[2]=rr[3];
           tt[3]=(rr[4]+rr[5])/2;           
           tt[4]=rr[6];
           
           c1=tt[1]-pp[1];     
           c2=tt[3]-pp[3];           
             
           if(fabs(c1)>c3||fabs(c2)>c3)
            {  if(k>=2)
                  fprintf(fpo,"%-8.3lf %8.5lf %8.3lf %8.5lf %8.0lf\n",tt1[0],tt1[1],tt1[2],tt1[3],tt1[4]);

                for(j=0;j<5;j++)
                  pp[j]=tt[j];

                fprintf(fpo,"%-8.3lf %8.5lf %8.3lf %8.5lf %8.0lf\n",pp[0],pp[1],pp[2],pp[3],pp[4]); 

               k=0;             
            }
            tt1[0]=tt[0];    tt1[1]=tt[1];    tt1[2]=tt[2];    tt1[3]=tt[3];    tt1[4]=tt[4];
                     
         }
      if(k>0)
         fprintf(fpo,"%-8.3lf %8.5lf %8.3lf %8.5lf%8.0lf\n",tt[0],tt[1],tt[2],tt[3],tt[4]);

     fclose(fpi);
     fclose(fpo); 

     exit(0);

    getch();    /* 請不要刪除此行 */
}