Question

I need help finding the several errors and several loop errors for I get the final output. C++ cLion

#include <iostream>
using namespace std;

int main() {
cout << "Welcome to Loop World" << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section I" << endl;
cout << "******************" << endl;

int sum; // Accumulates the total
int i; // Used as loop control variable
int numIter; // The number of times to iterate
cout << "Enter a number greater than 1 to sum up to: ";
cin >> numIter;
for (i = 1; i < numIter; ++i) {
sum += i;
}
cout << "The sum of the numbers from 1 to " << numIter << " (inclusive) is: " << sum << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section II" << endl;
cout << "******************" << endl;

double total; // Accumulates total
double price; // Gets next price from user
int numItems; // Number of items
int counter = 1; // Loop control counter

cout << "How many items do you have? ";
cin >> numItems;
cout << endl;

while (counter <= numItems) {
total = 0;
cout << "Enter the price of item " << counter << ": ";
cin >> price;
cout << endl;
total += price;
counter++;
}
cout << "The total price is: " << total << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section III" << endl;
cout << "******************" << endl;

int sum2 = 0;
int counter2 = 1;
int numIter2;

cout << "What number do you wish me to sum to?" << endl;
cin >> numIter2;

do {
sum2 += counter2;
cout << "Sum so far: " << sum2 << endl;
} while (counter2 <= sum2);

cout << endl << "Section III Recap" << endl;

cout << "I calculated the sum of numbers from 1 to " << numIter2 << " (inclusive) as " << sum2 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section IV" << endl;
cout << "******************" << endl;

cout << "I will now calculate ";
cout << "the sum of squares from 1 to ? (inclusive)" << endl;
  
int numIter3;
cin >> numIter3;

int sum3 = 0;
for (int i3 = numIter3; i3 > 0; i3++) {
sum3 += i3*i3;
}

cout << "The sum of squares from 1 to " << numIter3 << " is: " << sum3 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section V" << endl;
cout << "******************" << endl;

cout << "I will now calculate ";
cout << "the sum of cubes from 1 to ? (inclusive)" << endl;

int numIter4;
cin >> numIter4;

int sum4 = 0;
int counter4 = 1;

while (counter4 < 10) {
sum4 += (counter4 * counter4 * counter4);
}

counter4++;

cout << "The sum of cubes from 1 to " << numIter4 << " is: " << sum4 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section Done" << endl;
cout << "******************" << endl;

cout << endl << "Congrats! You fixed them all (hopefully correctly!)" << endl << endl << "Goodbye" << endl << endl;

return 0;
}

Answer 1

// Wherever I have changed the code, I have commented like "// G - Changed i<num......... ", means comments starting with G have been made by me. I've also included screenshots of the results of the code.

#include <iostream>

using namespace std;

int main()
{
cout << "Welcome to Loop World" << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section I" << endl;
cout << "******************" << endl;

int sum; // Accumulates the total
int i; // Used as loop control variable
int numIter; // The number of times to iterate
cout << "Enter a number greater than 1 to sum up to: ";
cin >> numIter;
for (i = 1; i <= numIter; ++i) { // G - Changed i<numIter to i<=numIter to include the final number in sum
sum += i;
}
cout << "The sum of the numbers from 1 to " << numIter << " (inclusive) is: " << sum << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section II" << endl;
cout << "******************" << endl;

double total; // Accumulates total
double price; // Gets next price from user
int numItems; // Number of items
int counter = 1; // Loop control counter

cout << "How many items do you have? ";
cin >> numItems;
cout << endl;

total = 0; // G - Initialisation of total was inside the while loop previously which would get reset on every iteration, so took it out
while (counter <= numItems) {
cout << "Enter the price of item " << counter << ": ";
cin >> price;
cout << endl;
total += price;
counter++;
}
cout << "The total price is: " << total << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section III" << endl;
cout << "******************" << endl;

int sum2 = 0;
int counter2 = 1;
int numIter2;

cout << "What number do you wish me to sum to?" << endl;
cin >> numIter2;

do {
sum2 += counter2;
counter2++; // G - Added counter increment
cout << "Sum so far: " << sum2 << endl;
} while (counter2 <= numIter2); // G - Changed sum2 to numIter2

cout << endl << "Section III Recap" << endl;

cout << "I calculated the sum of numbers from 1 to " << numIter2 << " (inclusive) as " << sum2 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section IV" << endl;
cout << "******************" << endl;

cout << "I will now calculate ";
cout << "the sum of squares from 1 to ? (inclusive)" << endl;
  
int numIter3;
cin >> numIter3;

int sum3 = 0;
for (int i3 = numIter3; i3 > 0; i3--) { // G - Changed i3++ to i3-- because the loop is adding square of highest value first, then coming down in a descending manner
sum3 += i3*i3;
}

cout << "The sum of squares from 1 to " << numIter3 << " is: " << sum3 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section V" << endl;
cout << "******************" << endl;

cout << "I will now calculate ";
cout << "the sum of cubes from 1 to ? (inclusive)" << endl;

int numIter4;
cin >> numIter4;

int sum4 = 0;
int counter4 = 1;

while (counter4 <= numIter4) { // G - Changed counter4<10 to counter4<numIter4
sum4 += (counter4 * counter4 * counter4);
counter4++; // G - Inserted counter4 increment which was previously immediately outside the while loop
}

cout << "The sum of cubes from 1 to " << numIter4 << " is: " << sum4 << endl;

cout << endl;
cout << "******************" << endl;
cout << "Section Done" << endl;
cout << "******************" << endl;

cout << endl << "Congrats! You fixed them all (hopefully correctly!)" << endl << endl << "Goodbye" << endl << endl;

return 0;
}