t21.c

c语言小程序100个

#include <conio.h>
#include <math.h>
#include <stdio.h>

float countvalue()
{
}

main()
{clrscr();
printf("实根=%f\n",countvalue());
printf("%f\n",cos(countvalue())-countvalue());
writeDat();}
writeDat()
{FILE *wf;
wf=fopen("OUT17.DAT","w");
fprintf(wf,"%f\n",countvalue());
fclose(wf);}