Metode Secant Dengan Bahasa C++

LISTING PROGRAM

#include<stdio.h>;

#include<conio.h>;

#include<math.h>;

/*x0 = harga awal

x1 = harga kedua

tol = toleransi

max_iter = jumlah iterasi maksimum */

float x0, x1, tol;

int max_iter;

float f(float x)

{

return 4*x*x - x - 5;

}

void main ()

{

int it;

float epsilon, xb;

printf("METODE SECANT");

printf("\n\n\n");

printf("Soal\n");

printf("Akar Persamaan y=3*x*x - 2*x - 5 \n\n\n");

printf("Masukan Nilai a : "); scanf("%f",&x0);

printf("Masukan Nilai b : ");scanf("%f",&x1);

printf("Masukan Nilai Toleransi : ");scanf("%f",&tol);

printf("Jumlah Iterasi Maksimum : ");scanf("%d",&max_iter);

it = 0;

printf("\n");

printf(" I x f(x) epsilon\n");

printf("\n");

do

{

it = it +1;

xb = x1 - f(x1)*(x1 - x0) / (f(x1) - f(x0));

epsilon = fabs(xb-x0);

printf("%3d %8.5f %8.5f %8.2e\n",it, xb, f(xb), epsilon);

printf("\n");

x0 = x1;

x1 = xb;

}

while(it <= max_iter && epsilon > tol);

if(it <= max_iter)

{

printf("\n");

printf("Toleransi terpenuhi\n\n");

printf("Hasil akhir=%g\n",xb);

printf("\n");

}

else

printf("Toleransi tidak terpenuhi\n");

getch();

}