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應用電腦

應用電腦. (Applied Computer Science). 授課老師 : 游政谷. ComputerScience(3). 寫作 Fortran 的格式. 第 1~5 格只能空白或是阿拉伯數字 第 1 格如為英文字母 C 則表示那一行為註解 , 編譯器不會編譯此行的程式碼 第 6 格只能是空白或是零以外的任何字元 ( 用來表示接續上一行的程式 ) 第 73 格之後則不使用. Program example ( 程式開始 ) ….. ….. ….. ….. Stop ( 程式結束 )

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應用電腦

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  1. 應用電腦 (Applied Computer Science) 授課老師: 游政谷 ComputerScience(3)

  2. 寫作Fortran的格式 第1~5格只能空白或是阿拉伯數字 第1格如為英文字母C則表示那一行為註解, 編譯器不會編譯此行的程式碼 第6格只能是空白或是零以外的任何字元(用來表示接續上一行的程式) 第73格之後則不使用 Program example (程式開始) ….. ….. ….. ….. Stop (程式結束) End (程式敘述完畢) 程式主體 See example1 for explanation 第7格到72格為程式寫作範圍

  3. Example1 c this program is to calculate some thermodynamic parameters as you inputc pressure, temperature and dew point program example1 real pre,t,td,w,tv es(tt)=6.112*exp(17.67*tt/(tt+243.5)) write(6,*)'input pressure(mb),temperature(c),td(c)--real' read(5,*)pre,t,td w=0.622*es(td)/(pre-es(td)) ws=0.622*es(t)/(pre-es(t)) tv=(t+273.15)*(1.+0.61*w) den=pre*100./287./tv theta=(t+273.15)*(1000./pre)**(287./1005.) thetav=tv*(1000./pre)**(287./1005.) call get_ept(t,pre,td,oept) write(6,*)'P=',pre,' T=',t,' Td=',td,' mixing ratio=',w,' Tv=',tv + ,' thetav=',thetav,‘ saturated mixing ratio=',ws write(6,*)' theta=',theta, ‘ ept=', oept, ‘ density=',den stop end 程式主體

  4. Fortran 的資料型態 • 整數 (integer) 2345, 126 • 浮點數 (real) 3.45, 78.654 • 複數 (complex) a+bi • 字元 (character) hou, no, h, 23 • 邏輯判斷 (true或是false) Fortran 的數學運算式 • + 加法 計算的優先順序: • 減法 (1) ( ) 括號中的算式 • * 乘法 (2) ** • / 除法 (3) * / • ** 乘冪, 次方 (4) + - • ( ) 括號起來的部分優先計算 EX: A = 2**3 + 3*(4/2) = 14

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