Question

#include
#include
using namespace std;

/*
Vector testGrades contains NUM_VALS test scores. Write a for loop that sets sumExtra to the total extra credit received. Full credit is 100, so anything over 100 is extra credit. Ex: If testGrades = {101, 83, 107, 90}, then sumExtra = 8, because 1 + 0 + 7 + 0 is 8.
*/

int main() {
const int NUM_VALS = 4;
vector testGrades(NUM_VALS);
int i = 0;
int sumExtra = -9999; // Assign sumExtra with 0 before your for loop

testGrades.at(0) = 101;
testGrades.at(1) = 83;
testGrades.at(2) = 107;
testGrades.at(3) = 90;

/* Your solution goes here */
sumExtra = 0;

for(i = 0; i <= testGrades.size() -1; i++){
if(testGrades.at(i) > 100){
sumExtra = sumExtra + (testGrades.at(i) - 100);
}
}

cout << "sumExtra: " << sumExtra << endl;
return 0;
}

Answer 1

Answer:

#include <iostream>

#include <vector>

using namespace std;

int main() {

const int NUM_VALS = 4;

vector<int> testGrades(NUM_VALS);

int i = 0;

int sumExtra = -9999; // Assign sumExtra with 0 before your for loop

testGrades.at(0) = 101;

testGrades.at(1) = 83;

testGrades.at(2) = 107;

testGrades.at(3) = 90;

/* Your solution goes here */

sumExtra = 0;

for(i = 0; i <= testGrades.size() -1; i++){

   if(testGrades.at(i) > 100){

       sumExtra = sumExtra + (testGrades.at(i) - 100);

   }

}

cout << "sumExtra: " << sumExtra << endl;

return 0;

}

Explanation:

Looks like you almost solved the question. I highlighted the parts you have been missing above.

In order to use vectors in C++, you need to add the vector library at the beginning of the program, #include <vector>

In order to initialize the vector, you need to specify its type inside <int>, since we work with the integers in the question the type must be int