Map을 이용하여 회사원의 투입플젝 확인 하기

 

자료는 아래와 같이 파일로 저장되었을 때 읽어서 합계 내는 방법 

 

1,201001,Kim,1,0,0
1,201002,Kang,0,0,1

class DS2_Dictionary     {         static void Main(string[] args)         {             Dictionary<string, Effort> m = new Dictionary<string, Effort>();             string line;             StreamReader file = new StreamReader("DS_Sample2.csv");             while ((line = file.ReadLine()) != null)             {                 Effort userEffort = new Effort();                 char[] delimiterChars = { ',' };                 string[] words = line.Split(delimiterChars);                 string key = words[1];                 if (!m.ContainsKey(key))                 {                     userEffort.setName(words[2]);                     userEffort.setProjectA(Convert.ToDouble(words[3]));                     userEffort.setProjectB(Convert.ToDouble(words[4]));                     userEffort.setProjectC(Convert.ToDouble(words[5]));                     m.Add(key, userEffort);                 }                 else                 {                     m[key].addProjectA(Convert.ToDouble(words[3]));                     m[key].addProjectB(Convert.ToDouble(words[4]));                     m[key].addProjectC(Convert.ToDouble(words[5]));                 }             }             file.Close();              //foreach (KeyValuePair<string, Effort> items in m.OrderBy(x => x.Key))             foreach (KeyValuePair<string, Effort> items in m)             {                 double total = items.Value.getProjectA() + items.Value.getProjectB() + items.Value.getProjectC();                 string s = items.Key + "\t" + items.Value.getName() + "\t" + items.Value.getProjectA() + "\t" + items.Value.getProjectB() + "\t" + items.Value.getProjectC() + "\t=>\t" + total;                 Console.WriteLine(s);             }         }     }     public class Effort     {         private String strName;         private double ProjectA;         private double ProjectB;         private double ProjectC;         public String getName()         {             return strName;         }         public void setName(String strName)         {             this.strName = strName;         }         public double getProjectA()         {             return ProjectA;         }         public void setProjectA(double n)         {             ProjectA = n;         }         public double getProjectB()         {             return ProjectB;         }         public void setProjectB(double n)         {             ProjectB = n;         }         public double getProjectC()         {             return ProjectC;         }         public void setProjectC(double n)         {             ProjectC = n;         }         public void addProjectA(double n)         {             ProjectA += n;         }         public void addProjectB(double n)         {             ProjectB += n;         }         public void addProjectC(double n)         {             ProjectC += n;         }     }

 

소수점 2자리 반올림 

 

//Math Class를 이용
double value  = 5.123456789;


// 반올림
double result = Math.Round(value, 5);
//결과값 result = "5.12346" 

// 올림
result = Math.Ceiling(value);
//결과값 result = "6" 

// 내림
result = Math.Truncate(value);
//결과값 result = "5"