Creating a Borland C++ Builder-compatible dll in Visual C++ - c++

Question

friends and comrades!
I have program that was created in Borland C++ Builder. This program uses several dll libraries that was created in Borland C++ Builder too. But now we use Microsoft Visual Studio.
I have task to rewrite existing dll. I need to add several new strings with math-formulas. Chief gave me cpp-file, that was written in Borland C++ Builder. I have included needed formulas, but I'm not sure that i made correct preprocessor directives. Must I build only cpp-file? Are there needed any other files?
Original cpp-file
#include <windows.h>
#include <stdio.h>
#include <math.h>
#pragma argsused
void FAR PASCAL _export userdll(float *x,char *c1,char *c2,char *c3,char *c4,char *c5)
{
x[501]=x[115]*9.81; // -- Mdv v Nm
x[502]=x[501]*x[122]/7023.5; //-- Ndv v lc
x[503]=x[502]*0.7355; // -- Ndv v kW
if(x[502]>1.0&&x[123]>4.0)x[510]=x[123]/x[502]; // -- Ce v kg/lc*h
else x[510]=0;
if(x[502]>1.0&&x[123]>4.0)x[511]=x[123]/x[503]; // -- Ce v kg/kW*h
else x[511]=0;
x[520]=x[34]*7.50064; // -- Pbar v mmHg
return;
}
Rewritten cpp-file
#define STRUCT
#include <windows.h>
#include <stdio.h>
#include <math.h>
#pragma argsused
__declspec(dllexport)
void FAR PASCAL userdll(float *x, char *c1, char *c2, char *c3, char *c4, char *c5)
{
x[501] = x[115] * 9.81; // -- Mdv v Nm
x[502] = x[501] * x[122] / 7023.5; //-- Ndv v lc
x[503] = x[502] * 0.7355; // -- Ndv v kW
if (x[502] > 1.0 && x[123] > 4.0)
x[510] = x[123] / x[502]; // -- Ce v kg/lc*h
else x[510] = 0;
if (x[502] > 1.0 && x[123] > 4.0)
x[511] = x[123] / x[503]; // -- Ce v kg/kW*h
else x[511] = 0;
x[520] = x[34] * 7.50064; // -- Pbar v mmHg
int chooseStr, chooseCol;
float temp; // temp - ТЕМПЕРАТУРА по датчику
float DAVLENIE; // ДАВЛЕНИЕ по таблице из ГОСТ Р 52517-2005
float massiv[61][9] =
{
// --------------------------------------------------------------------------------------
// | Влажность, % | |
// -------------------------------------------------------| Температура, град. Цельсия |
// | 100 | 90 | 80 | 70 | 60 | 50 | 40 | 30 | 20 | |
// --------------------------------------------------------------------------------------
{ 0.30, 0.27, 0.24, 0.21, 0.18, 0.15, 0.12, 0.09, 0.06 }, // -10
{ 0.33, 0.29, 0.26, 0.23, 0.20, 0.16, 0.13, 0.10, 0.07 }, // -9
{ 0.35, 0.32, 0.28, 0.25, 0.21, 0.18, 0.14, 0.11, 0.07 }, // -8
{ 0.38, 0.34, 0.30, 0.27, 0.23, 0.19, 0.15, 0.11, 0.08 }, // -7
{ 0.41, 0.36, 0.32, 0.28, 0.24, 0.20, 0.16, 0.12, 0.08 }, // -6
{ 0.43, 0.39, 0.35, 0.30, 0.26, 0.22, 0.17, 0.13, 0.09 }, // -5
{ 0.46, 0.41, 0.37, 0.32, 0.28, 0.23, 0.18, 0.14, 0.09 }, // -4
{ 0.49, 0.44, 0.39, 0.34, 0.30, 0.25, 0.20, 0.15, 0.10 }, // -3
{ 0.53, 0.47, 0.42, 0.37, 0.32, 0.26, 0.21, 0.16, 0.10 }, // -2
{ 0.56, 0.50, 0.45, 0.39, 0.34, 0.28, 0.22, 0.17, 0.11 }, // -1
{ 0.60, 0.54, 0.48, 0.42, 0.36, 0.30, 0.24, 0.18, 0.12 }, // 0
{ 0.64, 0.58, 0.51, 0.45, 0.39, 0.32, 0.26, 0.19, 0.13 }, // 1
{ 0.69, 0.62, 0.55, 0.48, 0.41, 0.34, 0.28, 0.21, 0.14 }, // 2
{ 0.74, 0.66, 0.59, 0.52, 0.44, 0.37, 0.30, 0.22, 0.15 }, // 3
{ 0.79, 0.71, 0.63, 0.55, 0.47, 0.40, 0.32, 0.24, 0.16 }, // 4
{ 0.85, 0.76, 0.68, 0.59, 0.51, 0.42, 0.34, 0.25, 0.17 }, // 5
{ 0.91, 0.82, 0.73, 0.64, 0.55, 0.46, 0.36, 0.27, 0.18 }, // 6
{ 0.98, 0.88, 0.78, 0.68, 0.59, 0.49, 0.39, 0.29, 0.20 }, // 7
{ 1.05, 0.94, 0.84, 0.73, 0.63, 0.52, 0.42, 0.31, 0.21 }, // 8
{ 1.12, 1.01, 0.90, 0.78, 0.67, 0.56, 0.45, 0.34, 0.22 }, // 9
{ 1.20, 1.08, 0.96, 0.84, 0.72, 0.60, 0.48, 0.36, 0.24 }, // 10
{ 1.28, 1.16, 1.03, 0.90, 0.77, 0.64, 0.51, 0.39, 0.26 }, // 11
{ 1.37, 1.24, 1.10, 0.96, 0.82, 0.69, 0.55, 0.41, 0.27 }, // 12
{ 1.47, 1.32, 1.17, 1.03, 0.88, 0.73, 0.59, 0.44, 0.29 }, // 13
{ 1.57, 1.41, 1.25, 1.10, 0.94, 0.78, 0.63, 0.47, 0.31 }, // 14
{ 1.67, 1.51, 1.34, 1.17, 1.00, 0.84, 0.67, 0.50, 0.33 }, // 15
{ 1.79, 1.61, 1.43, 1.25, 1.07, 0.89, 0.71, 0.54, 0.36 }, // 16
{ 1.90, 1.71, 1.52, 1.33, 1.14, 0.95, 0.76, 0.57, 0.38 }, // 17
{ 2.03, 1.83, 1.62, 1.42, 1.22, 1.01, 0.81, 0.61, 0.41 }, // 18
{ 2.16, 1.94, 1.73, 1.51, 1.30, 1.08, 0.86, 0.65, 0.43 }, // 19
{ 2.30, 2.07, 1.84, 1.61, 1.38, 1.15, 0.92, 0.69, 0.46 }, // 20
{ 2.45, 2.20, 1.96, 1.71, 1.47, 1.22, 0.98, 0.73, 0.49 }, // 21
{ 2.60, 2.34, 2.08, 1.82, 1.56, 1.30, 1.04, 0.78, 0.52 }, // 22
{ 2.77, 2.49, 2.21, 1.94, 1.66, 1.38, 1.11, 0.83, 0.55 }, // 23
{ 2.94, 2.65, 2.35, 2.06, 1.76, 1.47, 1.18, 0.88, 0.59 }, // 24
{ 3.12, 2.81, 2.50, 2.19, 1.87, 1.56, 1.25, 0.94, 0.62 }, // 25
{ 3.32, 2.98, 2.65, 2.32, 1.99, 1.66, 1.33, 0.99, 0.66 }, // 26
{ 3.52, 3.17, 2.82, 2.46, 2.11, 1.76, 1.41, 1.06, 0.70 }, // 27
{ 3.73, 3.36, 2.99, 2.61, 2.24, 1.87, 1.49, 1.12, 0.75 }, // 28
{ 3.96, 3.56, 3.17, 2.77, 2.38, 1.98, 1.58, 1.19, 0.79 }, // 29
{ 4.20, 3.78, 3.36, 2.94, 2.52, 2.10, 1.68, 1.26, 0.84 }, // 30
{ 4.45, 4.01, 3.56, 3.12, 2.67, 2.23, 1.78, 1.34, 0.89 }, // 31
{ 4.72, 4.25, 3.78, 3.30, 2.83, 2.36, 1.89, 1.42, 0.94 }, // 32
{ 5.00, 4.50, 4.00, 3.50, 3.00, 2.50, 2.00, 1.50, 1.00 }, // 33
{ 5.29, 4.76, 4.24, 3.71, 3.18, 2.65, 2.12, 1.59, 1.06 }, // 34
{ 5.60, 5.04, 4.48, 3.92, 3.36, 2.80, 2.24, 1.68, 1.12 }, // 35
{ 5.93, 5.34, 4.74, 4.15, 3.56, 2.97, 2.37, 1.78, 1.19 }, // 36
{ 6.27, 5.64, 5.02, 4.39, 3.76, 3.14, 2.51, 1.88, 1.25 }, // 37
{ 6.63, 5.97, 5.30, 4.64, 3.98, 3.32, 2.65, 1.99, 1.33 }, // 38
{ 7.01, 6.31, 5.61, 4.90, 4.20, 3.50, 2.80, 2.10, 1.40 }, // 39
{ 7.40, 6.66, 5.92, 5.18, 4.44, 3.70, 2.96, 2.22, 1.48 }, // 40
{ 7.81, 7.03, 6.25, 5.47, 4.69, 3.91, 3.12, 2.34, 1.56 }, // 41
{ 8.24, 7.42, 6.59, 5.77, 4.94, 4.12, 3.30, 2.47, 1.65 }, // 42
{ 8.69, 7.82, 6.95, 6.08, 5.21, 4.34, 3.47, 2.61, 1.74 }, // 43
{ 9.15, 8.24, 7.32, 6.41, 5.49, 4.58, 3.66, 2.75, 1.83 }, // 44
{ 9.63, 8.67, 7.71, 6.74, 5.78, 4.82, 3.85, 2.89, 1.93 }, // 45
{ 10.13, 9.12, 8.11, 7.09, 6.08, 5.07, 4.05, 3.04, 2.03 }, // 46
{ 10.65, 9.58, 8.52, 7.45, 6.39, 5.33, 4.26, 3.20, 2.13 }, // 47
{ 11.18, 10.07, 8.95, 7.83, 6.71, 5.59, 4.47, 3.36, 2.24 }, // 48
{ 11.73, 10.56, 9.39, 8.21, 7.04, 5.87, 4.69, 3.52, 2.35 }, // 49
{ 12.30, 11.07, 9.84, 8.61, 7.38, 6.15, 4.92, 3.69, 2.46 } // 50
};
temp = x[33];
chooseStr = roundf(temp) + 10; // Округляем для получения номера строки в массиве massiv
if (x[32] <= 100 && x[32] > 95)
chooseCol = 0;
if (x[32] <= 95 && x[32] > 85)
chooseCol = 1;
if (x[32] <= 85 && x[32] > 75)
chooseCol = 2;
if (x[32] <= 75 && x[32] > 65)
chooseCol = 3;
if (x[32] <= 65 && x[32] > 55)
chooseCol = 4;
if (x[32] <= 55 && x[32] > 45)
chooseCol = 5;
if (x[32] <= 45 && x[32] > 35)
chooseCol = 6;
if (x[32] <= 35 && x[32] > 25)
chooseCol = 7;
if (x[32] <= 25)
chooseCol = 8;
DAVLENIE = massiv[chooseStr][chooseCol]; // Давление по таблице из ГОСТ Р 52517-2005
x[530] = ((x[34] - DAVLENIE) / 100.26)*sqrt(288 / (273 + x[33])); // Коэффициент индикаторной мощности К (формула 3)
x[531] = 1.15*x[530] - 0.15; // Коэффициент приведения Аи (формула 2)
x[535] = x[502] / x[531]; // Приведенная мощность, л.с. (формула 1)
x[536] = x[503] / x[531]; // Приведенная мощность, кВт (формула 1)
x[533] = x[501] / x[531]; // Приведенный крутящий момент, Н*м (формула 4)
x[537] = x[123] / x[530]; // Приведенный расход топлива, кг/ч (формула 5)
x[539] = (x[123] * 1000 * x[531]) / (x[503] * x[530]); // Приведенный удельный расход топлива Ceи, г/(кВТ*ч) (формула 6)
return;
}
If it's possible, check this code. I obtained several errors after copying dll-file to program folder and executing program. Program (written in Borland C++) can't use my dll file (created in Visual Studio).
One of the error is something like this
"...Missing MSVCR120D.dll file..."
Thank you in advance, friends!