prog1.c

南开百题的源码,共30道,都已经通过测试,希望对大家有所帮助.

#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("out.dat","w") ;
  fprintf(wf, "%f\n", countValue()) ;
  fclose(wf) ;
}