Convert a simple C code to matlab

8 次查看（过去 30 天）
H-H
H-H 2014-10-31
编辑： Abhiram Bhanuprakash 2014-10-31
Can you help to change this simple C code to matlab?
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
main(int argc, char **argv)
{
int nInputs;
double X1, X2, X3, X4, Y;
FILE *fIn = fopen(argv[1], "r");
FILE *fOut;
if (fIn == NULL)
{
printf("Simulator ERROR - cannot open in/out files.\n");
exit(1);
}
fscanf(fIn, "%d", &nInputs);
fscanf(fIn, "%lg", &X1);
fscanf(fIn, "%lg", &X2);
fscanf(fIn, "%lg", &X3);
fscanf(fIn, "%lg", &X4);
Y = 1.0 + 2 * X1 + 3.5 * X2 + 3.5 * X3 + 5 * X4;
Y += 6 * X1 * X1 + 7.5 * X1 * X2 + 7.5 * X1 * X3 + 9 * X1 * X4;
Y += 10.5 * X2 * X2 + 11 * X2 * X3 + 13 * X2 * X4;
Y += 10.5 * X3 * X3 + 13 * X3 * X4 + 15 * X4 * X4;
fOut = fopen(argv[2], "w");
fprintf(fOut, " %24.16e\n", Y);
Y = 10 + 11 * X1 + 12.5 * X2 + 12.5 * X3 + 15 * X4;
Y += 14 * X1 * X1 + 7 * X1 * X2 + 7 * X1 * X3 + 3 * X1 * X4;
Y += 4 * X2 * X2 + 8 * X2 * X3 + 5 * X2 * X4;
Y += 4 * X3 * X3 + 5 * X3 * X4 + 2 * X4 * X4;
fprintf(fOut, " %24.16e\n", Y);
fclose(fOut);
}

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回答（1 个）

Abhiram Bhanuprakash
编辑：Abhiram Bhanuprakash 2014-10-31
Hi H-H,
I am sorry I cannot write the code for you, but I can point to to some MATLAB functions I know which could achieve what you are looking for:
1. You need not include header files in MATLAB.
2. Instead of main() function, you can define a function in MATLAB. For more info on MATLAB functions, refer this
3. You need not declare variables in MATLAB. MATLAB creates it on-the-go.
4. You need not use pointers for file operations. You can use fread , fscanf, fwrite and a host of other Low-Level File I/O functions described here
5. For the if-else construct, use if-else in MATLAB
6. As a substitute for the 'C' function 'fprintf', you can use input. Similarly, as a substitute for the C function 'fprintf', you can use disp.
7. You cannot use the syntax '+=' in MATLAB. For a += b; you need to explicitly use
a = a+b
If you need anything more on this you can just comment on this thread, and I would be glad to help.
Hope this helps,
Cheers!
Abhiram.

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