available.c

适合于初学者的C程序

#include "stdio.h"
#include "stdlib.h"
#include "math.h"
#define PI 3.14159265358979321
 main()
{   double y1,y2,y3,y4;
	double x,deltx=0.25*PI;
    /*deltx*=1.0e-8;*/

    x=0.5*PI-deltx;
    y1=sin(deltx); y2=cos(x);
    y3=cos(deltx); y4=sin(x);
    printf("\n y1=%22.15e",y1);
    printf("\n y2=%22.15e",y2);
    printf("\n y3=%22.15e",y3);
    printf("\n y4=%22.15e",y4);
    getchar();
    return 1;
}