Microsoft 2023 年所提供的 C# codecamp 基礎課程，總共有 38 個單元，完成後就可以獲得 Certification ，今天要來跟大家分享的是第六單元章節的內容。
本節內容
計算出某位學生的 GPA 結果，並按照指引一部一部完成數字和字串的處理。
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| string studentName = "Sophia Johnson";
string course1Name = "English 101";
string course2Name = "Algebra 101";
string course3Name = "Biology 101";
string course4Name = "Computer Science I";
string course5Name = "Psychology 101";
int course1Credit = 3;
int course2Credit = 3;
int course3Credit = 4;
int course4Credit = 4;
int course5Credit = 3;
int gradeA = 4;
int gradeB = 3;
int course1Grade = gradeA;
int course2Grade = gradeB;
int course3Grade = gradeB;
int course4Grade = gradeB;
int course5Grade = gradeA;
int totalCreditHours = 0;
totalCreditHours += course1Credit;
totalCreditHours += course2Credit;
totalCreditHours += course3Credit;
totalCreditHours += course4Credit;
totalCreditHours += course5Credit;
int totalGradePoints = 0;
totalGradePoints += course1Credit * course1Grade;
totalGradePoints += course2Credit * course2Grade;
totalGradePoints += course3Credit * course3Grade;
totalGradePoints += course4Credit * course4Grade;
totalGradePoints += course5Credit * course5Grade;
decimal gradePointAverage = (decimal) totalGradePoints/totalCreditHours;
int leadingDigit = (int) gradePointAverage;
int trailingDigits = (int) (gradePointAverage * 100) - (leadingDigit * 100);
Console.WriteLine($"Student: {studentName}\n");
Console.WriteLine("Course\t\t\t\tGrade\tCredit Hours");
Console.WriteLine($"{course1Name}\t\t\t{course1Grade}\t\t{course1Credit}");
Console.WriteLine($"{course2Name}\t\t\t{course2Grade}\t\t{course2Credit}");
Console.WriteLine($"{course3Name}\t\t\t{course3Grade}\t\t{course3Credit}");
Console.WriteLine($"{course4Name}\t{course4Grade}\t\t{course4Credit}");
Console.WriteLine($"{course5Name}\t\t{course5Grade}\t\t{course5Credit}");
Console.WriteLine($"\nFinal GPA:\t\t\t{leadingDigit}.{trailingDigits}");
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重點整理
這也是延續上一個章節到內容，持續的做字串和數字的處理。利用運算符和字串的組合來完成題目的要求，然後針對 decimal 和 int 型別更加多的理解與學習。
知識點的部分有：
- 假設
decimal gradePointAverage = 3.99872831;。(int) gradePointAverage的值為何？
Ans : 3
- 在下列程式碼
decimal x = 7 / 5; 中，為什麼 x = 1？
Ans : 分割兩個整數會執行整數除法
那我們下次見ʘ‿ʘ
參考資料
