#include <cstdlib>
#include <iostream>

using namespace std;

void table()
{
    int n1, n2, n3, i, j;
    float p;
    
    FILE*f1;
    n1=0;
    f1=fopen("f1.txt","r");
    while(!feof(f1))
        {
           n1++;
           fscanf(f1,"%f", &p);
        };
    fclose(f1);
    n1=n1/2;
    float **m1=new float*[n1];
    for (i=0; i<n1; i++)
    m1[i] = new float[2];
    f1=fopen("f1.txt","r");
    for (i=0; i<n1; i++)
    for (j=0; j<2; j++) fscanf(f1, "%f",&m1[i][j]);
    fclose(f1);    
    
    FILE*f2;
    n2=0;
    f2=fopen("f2.txt","r");
    while(!feof(f2))
        {
           n2++;
           fscanf(f2,"%f", &p);
        };
    fclose(f2);
    n2=n2/2;
    float **m2=new float*[n2];
    for (i=0; i<n2; i++)
    m2[i] = new float[2];
    f2=fopen("f2.txt","r");
    for (i=0; i<n2; i++)
    for (j=0; j<2; j++) fscanf(f2, "%f",&m2[i][j]);
    fclose(f1);
    
    FILE*f3;
    n3=0;
    f3=fopen("f3.txt","r");
    while(!feof(f3))
        {  
           n3++;
           fscanf(f3,"%f", &p);
        };
    fclose(f3);
    n3=n3/2;
    float **m3=new float*[n3];
    for (i=0; i<n3; i++)
    m3[i] = new float[2];
    f3=fopen("f3.txt","r");
    for (i=0; i<n3; i++)
    for (j=0; j<2; j++) fscanf(f1, "%f",&m3[i][j]);
    fclose(f3);
    float *z=new float[n1+n2+n3];
    for (i=0; i<n1; i++) z[i]=m1[i][0];
    for (i=n1; i<n1+n2; i++) z[i]=m2[i-n1][0];
    for (i=n1+n2; i<n1+n2+n3; i++) z[i]=m3[i-n1-n2][0];
    int min=0; float buf;
    for (i=0; i<n1+n2+n3-1; i++)
    {
        min=i;
        for (j=i+1; j<n1+n2+n3; j++) if (z[j]<z[min]) min=j;
        buf=z[i];
        z[i]=z[min];
        z[min]=buf;
    }
    int k;//количество различных элементов
    k=1;
    buf=z[0];
    for (i=1; i<n1+n2+n3; i++) 
      if (z[i]!=buf) {k++; buf=z[i];}
    float *x=new float[k];
    x[0]=z[0];
    buf=z[0]; j=1; i=1;
    for (i=1; i<k; i++)
      {
           while (z[j]==buf) j++;
           x[i]=z[j];
           buf=z[j];
           j++;
    }
    FILE*f;
    f=fopen("f.txt","w");
    fprintf(f,"           x              y1             y2            y3\n");
    for (i=0; i<k; i++) 
    {  
       bool ex=false;  
       fprintf(f,"%15.6f", x[i]);
       for (j=0; j<n1; j++) 
       if (m1[j][0]==x[i]) {fprintf(f,"%15.6f", m1[j][1]); ex=true;};
       if (ex==false) fprintf(f,"   значения нет"); 
       ex=false; 
       for (j=0; j<n2; j++)
       if (m2[j][0]==x[i]) {fprintf(f,"%15.6f", m2[j][1]); ex=true;}
       if (ex==false) fprintf(f,"   значения нет"); 
       ex=false; 
       for (j=0; j<n3; j++)
       if (m3[j][0]==x[i]) {fprintf(f,"%15.6f", m3[j][1]); ex=true;}
       if (ex==false) fprintf(f,"   значения нет"); 
       fprintf(f,"\n");
    }
    fclose(f);
}

int main(int argc, char *argv[])
{
    FILE *f1;
    f1=fopen("f1.txt", "r");
    if (f1 == NULL) 
    {
        printf("There is no file f1.txt\n"); 
        f1=fopen("f1.txt", "w");   
        fclose(f1);
    }
    fclose(f1);
    FILE *f2;
    f2=fopen("f2.txt", "r");
    if (f2 == NULL)
    {
        printf("There is no file f2.txt\n");
        f2=fopen("f2.txt", "w");
        fclose(f2);
    }
    fclose(f2);
    FILE *f3;
    f3=fopen("f3.txt", "r");
    if (f3 == NULL)
    {
        printf("There is no file f3.txt\n");
        f3=fopen("f3.txt", "w");
        fclose(f3);
    }
    fclose(f3);
    table();
    system("PAUSE");
    return EXIT_SUCCESS;
}