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39 lines
762 B
C++
39 lines
762 B
C++
#include <cmath>
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#include <cstdlib>
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#include <iostream>
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static float eq(float i) {
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return (pow(i, 3) - (4 * i) - 9); // origial equation
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}
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int main() {
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float a, b, z, c, m, n;
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system("clear");
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for (int i = 0; i < 100; i++) {
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z = eq(i);
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if (z >= 0) {
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b = i;
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a = --i;
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break;
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}
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}
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std::cout << "\nFirst initial: " << a;
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std::cout << "\nSecond initial: " << b;
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for (int i = 0; i < 100; i++) {
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float h, d;
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m = eq(a);
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n = eq(b);
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c = ((a * n) - (b * m)) / (n - m);
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a = c;
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z = eq(c);
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if (z > 0 && z < 0.09) { // stoping criteria
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break;
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}
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}
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std::cout << "\n\nRoot: " << c;
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return 0;
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}
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