47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
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#include "Trinome.h"
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#include <cmath>
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using namespace std;
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/* [0] CONSTRUCTEUR
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=========================================================*/
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Trinome::Trinome(){
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this->init(3);
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}
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/* [1] Renvoie le nom du type de calcul
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=========================================================*/
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string Trinome::getLibelle(){
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return "ax^2 + bx + c = 0";
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}
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/* [2] Effectue le calcul et renvoie le resultat
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=========================================================*/
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float* Trinome::calc(){
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const int a( this->operands[0] ),
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b( this->operands[1] ),
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c( this->operands[2] );
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float delta = pow(b,2) - 4*a*c;
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// DELTA > 0 -> 2 racines
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if( delta > 0 ){
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this->result = (float*) malloc(2*sizeof(float));
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this->result[0] = (-b-sqrt(delta)) / (2*a);
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this->result[1] = (-b+sqrt(delta)) / (2*a);
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// DELTA = 0 -> 1 racine
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}else if( delta == 0 ){
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this->result = (float*) malloc(2*sizeof(float));
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this->result[0] = (-b) / (2*a);
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// DELTA < 0 -> 0 racine
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}else{
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this->result = (float*) malloc(0*sizeof(float));
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}
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return this->result;
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}
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