1_pro.c

来自「C源代码 计算机等级考试C语言上机题」· C语言 代码 · 共 29 行

#include  <conio.h>
#include  <math.h>
#include  <stdio.h>
float countvalue()
{
  float x0,x1=0.0;
  while(1)
  {
    x0=x1;
    x1=cos(x0);
    if(fabs(x0-x1)<1e-6)  break;   
  }
  return x1;
}
main()
{
  clrscr();
  printf("实根=%f\n",countvalue());
  printf("%f\n",cos(countvalue())-countvalue());
  writeDat();
}
writeDat()
{
  FILE *wf;
  wf=fopen("OUT97.DAT","w");
  fprintf(wf,"%f\n",countvalue());
  fclose(wf);
}