Jugde for Tsinsen（Ver. Cpp)

#include <cstdio>#include <cmath>using namespace std;int main(int argc, char **argv)  {    FILE *f1 = fopen(argv[2], "r");    FILE *f2 = fopen(argv[3], "r");    FILE *f3 = fopen(argv[4], "w");        if (f1 == NULL)      {        fprintf(f3, "0\n");        return 0;      }        double x, y; int i = 0;        for ( ; ++i && fscanf(f2, "%lf", &x) != EOF; )      {        if (fscanf(f1, "%lf", &y) != 1)          {            fprintf(f3, "0\n");            fclose(f1);            fclose(f2);            fclose(f3);            return 0;          }        if (fabs(x - y) > 0.001)          {            fprintf(f3, "0\n%d: %lf", i, fabs (x - y));            fclose(f1);            fclose(f2);            fclose(f3);            return 0;          }      }        fprintf(f3, "1\n");    fclose(f1);    fclose(f2);    fclose(f3);        return 0;  }