c++ - 使用 C++ 更改 Fortran 输入文件中的变量

Question

我希望有人能给我建议，以便从 C++ 应用程序轻松更改 Fortran 输入文件中各种变量的值。

我有一个用 Fortran 编写的模型，但我正在编写一个 C++ 应用程序来循环执行该模型，但在每次模型执行后更改模型参数的值。

如有任何建议，我们将不胜感激。

谢谢!

    .Pnd file Subbasin: 1 7/26/2012 12:00:00 AM ArcSWAT 2009.93.7
Pond inputs:
           0.000    | PND_FR : Fraction of subbasin area that drains into ponds. The value for PND_FR should be between 0.0 and 1.0. If PND_FR = 1.0, the pond is at the outlet of the subbasin on the main channel
           0.000    | PND_PSA: Surface area of ponds when filled to principal spillway [ha]
           0.000    | PND_PVOL: Volume of water stored in ponds when filled to the principal spillway [104 m3]
           0.000    | PND_ESA: Surface area of ponds when filled to emergency spillway [ha]
           0.000    | PND_EVOL: Volume of water stored in ponds when filled to the emergency spillway [104 m3]
           0.000    | PND_VOL: Initial volume of water in ponds [104 m3]
           0.000    | PND_SED: Initial sediment concentration in pond water [mg/l]
           0.000    | PND_NSED: Normal sediment concentration in pond water [mg/l]
           0.000    | PND_K: Hydraulic conductivity through bottom of ponds [mm/hr].
               0    | IFLOD1: Beginning month of non-flood season
               0    | IFLOD2: Ending month of non-flood season
           0.000    | NDTARG: Number of days needed to reach target storage from current pond storage
          10.000    | PSETLP1: Phosphorus settling rate in pond for months IPND1 through IPND2 [m/year]
          10.000    | PSETLP2: Phosphorus settling rate in pond for months other than IPND1-IPND2 [m/year]
           5.500    | NSETLP1: Initial dissolved oxygen concentration in the reach [mg O2/l]
           5.500    | NSETLP2: Initial dissolved oxygen concentration in the reach [mg O2/l]
           1.000    | CHLAP: Chlorophyll a production coefficient for ponds [ ] 
           1.000    | SECCIP: Water clarity coefficient for ponds [m]
           0.000    | PND_NO3: Initial concentration of NO3-N in pond [mg N/l]
           0.000    | PND_SOLP: Initial concentration of soluble P in pond [mg P/L]
           0.000    | PND_ORGN: Initial concentration of organic N in pond [mg N/l]
           0.000    | PND_ORGP: Initial concentration of organic P in pond [mg P/l]
           5.000    | PND_D50: Median particle diameter of sediment [um]
               1    | IPND1: Beginning month of mid-year nutrient settling "season"
               1    | IPND2: Ending month of mid-year nutrient settling "season"
Wetland inputs:
           0.000    | WET_FR : Fraction of subbasin area that drains into wetlands
           0.000    | WET_NSA: Surface area of wetlands at normal water level [ha]
           0.000    | WET_NVOL: Volume of water stored in wetlands when filled to normal water level [104 m3] 
           0.000    | WET_MXSA: Surface area of wetlands at maximum water level [ha]
           0.000    | WET_MXVOL: Volume of water stored in wetlands when filled to maximum water level [104 m3]
           0.000    | WET_VOL: Initial volume of water in wetlands [104 m3]
           0.000    | WET_SED: Initial sediment concentration in wetland water [mg/l]
           0.000    | WET_NSED: Normal sediment concentration in wetland water [mg/l]
           0.000    | WET_K: Hydraulic conductivity of bottom of wetlands [mm/hr]
           0.000    | PSETLW1: Phosphorus settling rate in wetland for months IPND1 through IPND2 [m/year]
           0.000    | PSETLW2: Phosphorus settling rate in wetlands for months other than IPND1-IPND2 [m/year]
           0.000    | NSETLW1: Nitrogen settling rate in wetlands for months IPND1 through IPND2 [m/year]
           0.000    | NSETLW2: Nitrogen settling rate in wetlands for months other than IPND1-IPND2 [m/year]
           0.000    | CHLAW: Chlorophyll a production coefficient for wetlands [ ]
           0.000    | SECCIW: Water clarity coefficient for wetlands [m]
           0.000    | WET_NO3: Initial concentration of NO3-N in wetland [mg N/l]
           0.000    | WET_SOLP: Initial concentration of soluble P in wetland [mg P/l]
           0.000    | WET_ORGN: Initial concentration of organic N in wetland [mg N/l]
           0.000    | WET_ORGP: Initial concentration of organic P in wetland [mg P/l]
           0.000    | PNDEVCOEFF: Actual pond evaporation is equal to the potential evaporation times the pond evaporation coefficient
           0.000    | WETEVCOEFF: Actual wetland evaporation is equal to the potential evaporation times the wetland evaporation coefficient.

Answer 1

查看 Fortran 的名单 I/O，它可能适合您的目的。此功能的 IBM XL Fortran 文档是 here .请务必查阅您自己的编译器的文档，每个编译器在标准上都有一些奇怪的变化(或者标准可能不够严格)。