repeating loop/function

[believedancer]

For my program it keeps repeating the same function instead of going back to the main switch statement. after I choose which function I want to run and it gives me my answer, it will ask the same question again. How do I set the loop/program to go back to the main switch statement or main menu?


here is my program: (sorry its long)


#include <iostream>
#include <cmath>
using namespace std;

void MinMax (int x, int y, int z, int &min, int &max);
void Modulus (int m, int l, int &quotient, int &remainder);
int const ARRAY_SIZE =7;
double getTaylor(double x, int n, double error);
int error;
void Array();
int getInput();
int main()
{
bool check = true;
int choice;

double a, sum= 1, tmp;
int n, i, j;
int x, y, z, min, max;
int m, l;
int quotient, remainder;

choice= getInput();

do {

switch (choice) {
case 1:
cout << "Please enter three integers x, y, z: " << endl;
cin >> x >> y >> z;
MinMax (x, y, z, min, max);


cout << "Min is " << min << "Max is" << max << endl;
break;
case 2:
cout << "Please enter two integers:";
cin >> m >> l;
Modulus(m, l, quotient, remainder);
// call your function
break;
case 3:
cout << "Enter the values for x and n:" << endl;
cin >> a >> n;
cout << endl;
getTaylor (a, n, error);


cout << endl<< "Taylor series estimation is " << sum << "with an error of "<< error << endl;
cout << endl;
break;
case 4:
Array();
break;
case 5:
cout << "End of Program.\n";
check = false;
break;
default:


cout << "You have selected the" << choice << " option /n";
break;
}

} while (check);

return 0;
}
// ******************* END OF MAIN **************************
int getInput()
{

int choice;

cout << endl
<< " 1. MinMax \n"
<< " 2. Modulus \n"
<< " 3. Taylor Series\n"
<< " 4. Array IO \n"
<< " 5. Quit "
<< endl
<< endl
<< " Enter an operation number: ";
cin >> choice;
return choice;
}

void MinMax (int x, int y, int z, int &min, int &max)
{

if (x > y) {
x= max;
y= min;
} else {
y = max;
x = min;
}

if (z < min) {
z = min;
}
if ( z > max) {
z = max;
}

}

void Modulus (int m, int l, int &quotient, int &remainder)
{

quotient = m/l;
remainder = m%l;
cout << "Quotient is " << quotient << endl;
cout << "Remainder " << remainder << endl;


}

double getTaylor(double x, int n, double error)
{
int j, i;
double tmp, sum;
for (i=1; i <= n; i++) {
tmp=x;

for (j=1; j<1; j++)
tmp*=x;
for (j=1; j<= i; j++)
tmp/= j;
sum +=tmp;
}

error = fabs(exp(x) - sum);
return sum;
}


void Array()
{
int i;
char array[ARRAY_SIZE];

cout << "Please enter 7 digits separated by spaces:" << endl;

for (i = 0; i < ARRAY_SIZE; i++)
cin >> array[i];

for(i = 0; i < ARRAY_SIZE; i++)
cout << array[i] << endl;


cout << "Reversed =";
for (i = ARRAY_SIZE - 1; i >=0; i --) {
cout << array[i];
}


}

[believedancer]

how do I get my main menu inside the loop

[Militie]

Remember to use code tags!

First off, you need to initialize sum on line 124.

Second, the below code will repeat the loop until the input is 5.

#include <iostream>
#include <cmath>
using namespace std;

void MinMax(int x, int y, int z, int &min, int &max);
void Modulus(int m, int l, int &quotient, int &remainder);
int const ARRAY_SIZE = 7;
double getTaylor(double x, int n, double error);
int error;
void Array();
int getInput();
int main()
{
	bool check = true;
	int choice;

	double a, sum = 1, tmp;
	int n, i, j;
	int x, y, z, min, max;
	int m, l;
	int quotient, remainder;

	choice = getInput();

	do {

		switch (choice) {
		case 1:
			cout << "Please enter three integers x, y, z: " << endl;
			cin >> x >> y >> z;
			MinMax(x, y, z, min, max);


			cout << "Min is " << min << "Max is" << max << endl;
			break;
		case 2:
			cout << "Please enter two integers:";
			cin >> m >> l;
			Modulus(m, l, quotient, remainder);
			// call your function
			break;
		case 3:
			cout << "Enter the values for x and n:" << endl;
			cin >> a >> n;
			cout << endl;
			getTaylor(a, n, error);


			cout << endl << "Taylor series estimation is " << sum << "with an error of " << error << endl;
			cout << endl;
			break;
		case 4:
			Array();
			break;
		case 5:
			cout << "End of Program.\n";
			check = false;
			break;
		default:
			cout << "You have selected the" << choice << " option /n";
			break;
		}
		if (check){
			choice = getInput();
		}
	} while (check);

	return 0;
}
// ******************* END OF MAIN **************************
int getInput()
{

	int choice;

	cout << endl
		<< " 1. MinMax \n"
		<< " 2. Modulus \n"
		<< " 3. Taylor Series\n"
		<< " 4. Array IO \n"
		<< " 5. Quit "
		<< endl
		<< endl
		<< " Enter an operation number: ";
	cin >> choice;
	return choice;
}

void MinMax(int x, int y, int z, int &min, int &max)
{

	if (x > y) {
		x = max;
		y = min;
	}
	else {
		y = max;
		x = min;
	}

	if (z < min) {
		z = min;
	}
	if (z > max) {
		z = max;
	}

}

void Modulus(int m, int l, int &quotient, int &remainder)
{

	quotient = m / l;
	remainder = m%l;
	cout << "Quotient is " << quotient << endl;
	cout << "Remainder " << remainder << endl;


}

double getTaylor(double x, int n, double error)
{
	int j, i;
	double tmp, sum;
	for (i = 1; i <= n; i++) {
		tmp = x;

		for (j = 1; j<1; j++)
			tmp *= x;
		for (j = 1; j <= i; j++)
			tmp /= j;
		sum += tmp;
	}

	error = fabs(exp(x) - sum);
	return sum;
}


void Array()
{
	int i;
	char array[ARRAY_SIZE];

	cout << "Please enter 7 digits separated by spaces:" << endl;

	for (i = 0; i < ARRAY_SIZE; i++)
		cin >> array[i];

	for (i = 0; i < ARRAY_SIZE; i++)
		cout << array[i] << endl;


	cout << "Reversed =";
	for (i = ARRAY_SIZE - 1; i >= 0; i--) {
		cout << array[i];
	}


}

[believedancer]

thank you so much!

I initialized my sum variable.