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C-/C++-Quelltext

#include <iostream>
using namespace std;
#include <math.h>
#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main() {
    double a;   //Gegebene Seite
    int d;  //wahrheitswert
    int x;  //formelwert
    double y;   //zwischeninteger nr.1
    double z;   //zwischeninteger nr.2
    double z1;  //zwischeninteger nr.3
    double z2;  //zwischeninteger nr.4
    double z3;
    double z4;
    double z5;
    double z6;
    double z7;
    double z8;
    double z9;
    double test1;
    double test2;
    double test3;
    double f;
    double f1;
    long double schleife1;
    long double schleife2;
    long double finalif1;
    long double finalif2;
    int i;
    int I;
    int loop;
    long double finaldone;
    for (;;){
        loop = 0;
        x = 2;
        i = 1;
        I = 0;
        cout.precision(15);
        cout << "Bitte die Seitenlänge von A angeben:\n";
        cin >> a;
        if(a >= 0)      //Hier wird ein Errorloop benötigt für else
        cout << "Ist die gegebene Seite die Hypothenuse? (0=n/1=j)\n"; // auf ja/nein tastenbestätigung ändern
        cin >> d;
        if(!(d != 0 && d != 1))     //Hier wird ein Errorloop benötigt für else
        if(d == 1)
        y = pow(a, x);
        z = y/2;
        z1 = sqrt(z);
        z6 = z1*10;
        z7 = z6+0.5;
        z8 = floor(z7);
        z9 = z8/10;
        z2 = z9/10;
        z3 = pow(z2, x);
        z4 = z3*2;
        z5 = sqrt(z4);
        f1 = 10*z5+0.5;
        f = floor(f1)/10;
        test1 = pow(z9-f, x);
        test2 = pow(z9+f, x);
        test3 = test1+test2;
        schleife1 = z9-f;
        schleife2 = z9+f;
        if (test3 == a*a){
            cout << "Seite A:" << z9-f << "\n";
            cout << "Seite B:" << z9+f << "\n";
            cout << "Ja   " << test3 << "\n\n";}
        if (!(test3 == a*a)){
            //cout << "Nein   " << test3 << "   " << f1 << "\n\n";
            schleife1 = schleife1*10;
            schleife1 = schleife1+0.5;  
            schleife1 = floor(schleife1);
            schleife1 = schleife1/10;
            schleife2 = schleife2*10;
            schleife2 = schleife2+0.5;
            schleife2 = floor(schleife2);
            schleife2 = schleife2/10;
            for (;;){
                if (loop == 0){
                    schleife1 = schleife1-0.01;}
                if (loop == 1){
                    schleife2 = schleife2-0.01;}
                finalif1 = schleife1*schleife1;
                finalif2 = schleife2*schleife2;
                finaldone = finalif1+finalif2;
                cin.get();
                if (i == 1 && I == 0){
                    I = 1;
                    i = i+1;
                    system("cls");
                    cout << "Bitte warten.\n" << schleife1 << "   " << schleife2 << "\n" << finalif1 << "   " << finalif2 << "\n" << finaldone << "   " << a*a << "\n";}
                if (i == 2 && I == 0){
                    I = 1;
                    i = i+1;
                    system("cls");
                    cout << "Bitte warten..\n" << schleife1 << "   " << schleife2 << "\n" << finalif1 << "   " << finalif2 << "\n" << finaldone << "   " << a*a << "\n";}
                if (i == 3 && I == 0){
                    I = 1;
                    i = 1;
                    system("cls");
                    cout << "Bitte warten...\n" << schleife1 << "   " << schleife2 << "\n" << finalif1 << "   " << finalif2 << "\n" << finaldone << "   " << a*a << "\n";}
                if (loop == 0){
                    loop = 1;}
                else{
                    loop = 0;}
                I = 0;
                if (finaldone == a*a){
                    goto ende;}
ende:{
    cout << "Seite A:" << schleife1 << "\n";
    cout << "Seite B:" << schleife2 << "\n";
    cout << "Ja   " << "\n\n";}}}}
    //cout << finalif1 << " " << finalif2; 
    return 0;
}