08/01/27 01:28:32
>>603
#include <stdio.h>
#include <math.h>
double f(double x)
{
return sqrt(x)*sqrt(1.0-2.5e-5*x*x);
}
main()
{
double x;
FILE *fp;
if((fp=fopen("dat.csv","w"))==NULL){
printf("file can't open\n");
exit(1);
}
fprintf(fp,"x,f\n");
for(x=4.0;x<=20.0;x=x+0.5){
fprintf(fp,"%lf,%lf\n",x,f(x));
}
fclose(fp);
}