#include "math.h"

#define g1(x) (sqrt(10-x*x*x) / 2.)
#define g2(x) (x*x*x + 4*x*x + x - 10)
#define g3(x) (sqrt(10/x - 4*x))
#define g4(x) (x - (x*x*x + 4*x*x - 10)/(3*x*x + 8*x))

main()
{
int j, maxit;
float x, x0;

x0 = 1.5;
maxit = 25;

printf("\n\n");
x = x0;
for (j = 1; j <= maxit; j++)
    {
    printf("%3d  %f\n", j, x);
    x = g1(x);
    }

printf("\n\n");
x = x0;
for (j = 1; j <= maxit; j++)
    {
    printf("%3d  %f\n", j, x);
    x = g2(x);
    }

printf("\n\n");
x = x0;
for (j = 1; j <= maxit; j++)
    {
    printf("%3d  %f\n", j, x);
    x = g3(x);
    }

printf("\n\n");
x = x0;
for (j = 1; j <= maxit; j++)
    {
    printf("%3d  %f\n", j, x);
    x = g4(x);
    }
}