☆distance

#include <stdio.h>
#include <math.h>
#include <time.h>
#include<string.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    float x1,y1,z1,x2,y2,z2,x3,y3,z3,distance1,distance2,distance3,sum;
    float *tin_points;
    float *file1;
    int num_tris;
    int i;

    FILE *fpi1,*fpo;

    if(argc!=4)
    {
        fprintf(stderr,"Usage: %s (1)CSV1File",argv[0]);

        return 0;
    }

     if((fpi1=fopen(argv[1],"rb"))==NULL)
        {
                printf("The file can't be opened. The program is exit.\n");

                return 0;
        }
    num_tris=atoi(argv[3]);
    file1= (float *)malloc(num_tris*3*3*sizeof(float));

    //fread((float *)file1,sizeof(float),num_tris*3,fpi1);
    // while (fscanf(fpi1,"%f %f %f %f %f %f %f %f %f",&x1, &y1, &z1, &x2, &y2, &z2, &x3, &y3, &z3)!= EOF)


    if((fpo=fopen(argv[2],"wb"))==NULL)

        {

        fprintf(stderr,"output file open error\n");
        exit(1);

        }

    fread((float *)file1,sizeof(float),num_tris*3*3,fpi1);

    for(i=0;i<num_tris;i++)
    {

    //fread((float *)file1,sizeof(float),num_tris*3,fpo);
    x1=file1[3*i*3];
    y1=file1[3*i*3+1];
    z1=file1[3*i*3+2];
    x2=file1[(3*i+1)*3];
    y2=file1[(3*i+1)*3+1];
    z2=file1[(3*i+1)*3+2];
    x3=file1[(3*i+2)*3];
    y3=file1[(3*i+2)*3+1];
    z3=file1[(3*i+2)*3+2];

    /*printf("x1=%f\n",x1);
    printf("x2=%f\n",x2);
    printf("x3=%f\n",x3);
    printf("y1=%f\n",y1);
    printf("y2=%f\n",y2);
    printf("y3=%f\n",y3);
    printf("z1=%f\n",z1);
    printf("z2=%f\n",z2);
    printf("z3=%f\n",z3);*/

    //scanf ("%f %f %f %f %f %f %f %f %f" ,&x1,&y1,&z1,&x2,&y2,&z2,&x3,&y3,&z3);
    distance1 = sqrt(((x2-x1)*(x2-x1))+((y2-y1)*(y2-y1))+((z2-z1)*(z2-z1)));
    distance2 = sqrt(((x2-x3)*(x2-x3))+((y2-y3)*(y2-y3))+((z2-z3)*(z2-z3)));
    distance3 = sqrt(((x3-x1)*(x3-x1))+((y3-y1)*(y3-y1))+((z3-z1)*(z3-z1)));
    //sum=distance1+distance2+distance3;
    //printf ("%f %f %f %f",distance1,distance2,distance3,sum);



    fwrite(&distance1,sizeof(float),1,fpo);
    //printf("%f\n",distance1);
    fwrite(&distance2,sizeof(float),1,fpo);
    //printf("%f\n",distance2);
    fwrite(&distance3,sizeof(float),1,fpo);
    //printf("%f\n",distance3);
    //fwrite(&sum,sizeof(float),1,fpo);


    }

    return 0;
    free(file1);
    fclose(fpi1);
    fclose(fpo);
}