GPA Calulator - Converting Input to Value

Max Hemmrich

I'm trying to code a GPA calculator in Visual Basic 08 for an independent enrichment and have everything set up and am pretty much done, except for the actual GPA calculation part. I have 8 combo boxes, one for each class, where the user can select their grade (A, A-, B+, etc). The part I'm stuck on is the conversion from a letter grade to the corresponding GPA, for example, A = 4.0, A- = 3.7.

I tried using an if statement:

string chineseGrade;
decimal chineseGPA;

if (chineseGrade("A"))
{
chineseGPA = 4.0;
}

but i keep getting the error that "chineseGrade is a variable but is being used as a method" and that "Literal of type double cannot be implicitly converted to type 'decimal'; use an 'M' suffix to create a literal of this type"

What can I do to solve these errors?

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Suthish Nair15y ago
If this query got resolved then please Accept the post that helped you as Answer.
So other members can easily find the answers.

Suthish Nair15y ago

Sam is right.

change your code too

1. if (chineseGrade=="A")

2. use double chineseGPA or chineseGPA = Convert.ToDecimal(4.0);

Sam Hobbs15y ago
chineseGrade is a string variable but you are using it as if it is a method. The compiler is not psychic and neither are we. What is it that you need to do? As best as I understand your question, you are calculating a GPA for Chinese differently than for other people but as far as I know the Chinese are the same as everyone else. So perhaps the answer is that you can just use the same calculation for Chinese people as everyone else.