Birukov

#include <iostream>
#include <fstream>
#include <math.h>
#include <string>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>

using namespace std;

void print_file (char* file)
{
    char buff[50];
    FILE *fp=fopen(file, "r");
    std::string line;
    while(!feof(fp))
    {
        fgets(buff,50,fp);
        cout << buff << endl;
    }
    fclose(fp);

}
int main(int argc, char* argv[])
{
    setlocale(LC_ALL,"Rus");
    FILE *f1, *f2;
    char file[20], str[20],file2[20];
    double x,sin,cos,tg,ctg;

    if (argc > 1)
        strcpy(file, argv[1]);
    else
    {
        cout << "Введите имя файла: ";
        cin >> file;
    }

    if (argc > 2)
        strcpy(file2, argv[2]);
    else
    {
        printf("Введите имя конечного файла: ");
        cin >> file2;
    }

    cout << file << endl << file2 << endl;
    return 0;


    f1 = fopen(file, "r");
    print_file(file);

    f2 = fopen(file2, "w");
    fprintf(f2,"x\tsinx\tcosx\ttgx\tctgx\n");
    fseek(f1,12,SEEK_SET);
    while(!feof(f1))
    {
            fscanf(f1, "%d\t%lf\t%lf\n",&x,&sin,&cos);
            fprintf(f2, "%d\t%.4lf\t%.4lf\t",x, sin,cos);
            if((sin == 1 && cos == 0) || (sin == (-1) && cos == 0))
            fprintf (f2,"-\t");
            else fprintf(f2,"%.4lf\t",sin/cos);
            if((cos == 1 && sin == 0) || (cos == (-1) && sin == 0))
             fprintf (f2,"-\n");
            else fprintf(f2,"%.4lf\n",cos/sin);

    }
    fclose(f1);
    fclose(f2);
    print_file(file2);
    return 0;
}