C++

Forum

 
My program seems correct, but is miscalculating simple arithmetic by exactly 1

iluv41 (81)
I do not get any errors, but the grade calculated is 1 more than it should be. For example, if p1score=95
p2score=87
p3score=86
p4score=75
p5score=83
p6score=72
exam1score=80
exam2score=75
the grade calculated should be 79.52 but it's giving me 80.52 instead. Help please? I really do not know what the problem is.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
#include <iostream>                // include standard I/O libraries
#include <iomanip>
using namespace std;

int main()
{
    // the constant weights for all scoring items
    const double P1_WEIGHT = 0.02;
    const double P2_WEIGHT = 0.10;
    const double P3_TO_P6_WEIGHT = 0.12;
    const double EXAM_WEIGHT = 0.20;

    int p1score,                  // scores on the 6 programs
        p2score,
        p3score,
        p4score,
        p5score,
        p6score,
        exam1score,                // scores on the 2 exams
        exam2score;
    double wtdTotalGrd;            // the weighted total grade as calculated

    // ask the user to type in the program grades first
    cout << "Please enter your score on program 1 -> ";
    cin >> p1score;
    cout << "                           program 2 -> ";
    cin >> p2score;
    cout << "                           program 3 -> ";
    cin >> p3score;
    cout << "                           program 4 -> ";
    cin >> p4score;
    cout << "                           program 5 -> ";
    cin >> p5score;
    cout << "                           program 6 -> ";
    cin >> p6score;

    // now ask the user to type in the exam scores
    cout << endl << "Please enter your score on exam 1 -> ";
    cin >> exam1score;
    cout << "                           exam 2 -> ";
    cin >> exam2score;

    // echoprint all of the user's scores to verify accuracy
    cout << endl << "You have entered the following scores:" << endl
        << "\tProgram 1: " << p1score << endl
        << "\tProgram 2: " << p2score << endl
        << "\tProgram 3: " << p3score << endl
        << "\tProgram 4: " << p4score << endl
        << "\tProgram 5: " << p5score << endl
        << "\tProgram 6: " << p6score << endl
        << "\tExam 1: " << exam1score << endl
        << "\tExam 2: " << exam2score << endl << endl;

    // calculate the weighted total grade as a real number
wtdTotalGrd = (p1score * P1_WEIGHT) + (p2score * P2_WEIGHT)
        + ((p3score + p4score + p5score + p6score) * P3_TO_P6_WEIGHT)
        + ((exam1score + exam1score) * EXAM_WEIGHT);

    // now print the weighted total with 2 digits past the decimal point
    cout << fixed << showpoint << setprecision(2);
    cout << "Your weighted total is: " << wtdTotalGrd << endl;
Peter87 (11179)
On line 57 you mention exam1score twice.
Topic archived. No new replies allowed.