Re: What difference of file write operation between MSVC and MINGW421?

I am new to the difference between Microsoft and gcc. I think mingw4.2.1 is
from Linux world.

I have a code run SystemC, which a C++ library support Windows and Linxu, well
with Microsoft Visio Studio Express 10.0, but I would like to run with
Modelsim which has MINGW4.2.1. I find that the file write operation fails. If
I comment out the file operation part, it works. I have check the SystemC
documentation without finding any clue. I guess this basic file operation is
different for the two compiler.

What requirement for SystemC 2.3.1 work with Modelsim?

Could you help me on two compilers? Thanks,

The code is attached below.

Thanks,

.h file:

#define FILE_WRITE 1
/*
#undef FILE_WRITE
*/
struct fir: sc_module{
sc_in<bool> reset;
sc_in<bool> input_valid;
sc_in<int> sample;
sc_out<bool> output_data_ready;
sc_out<int> result;
sc_in_clk CLK;
int index;
#ifdef FILE_WRITE
FILE* fp_real;// ofstream myfile;
#endif
sc_int<9> coefs[16];

SC_CTOR(fir)
{
SC_CTHREAD(entry, CLK.pos());
reset_signal_is(reset,true);
#include "fir_const.h"
}

void entry();

#ifdef FILE_WRITE
~fir()
{
fclose( fp_real );
}
#endif
};

.c file:

void fir::entry() {

sc_int<8> sample_tmp;
sc_int<17> pro;
sc_int<19> acc;
sc_int<8> shift[16];
sc_uint<16> val; //variable to hold data
int tmp_out;

// reset watching
/* this would be an unrolled loop */
#ifdef FILE_WRITE
fp_real = fopen("out_example.txt","w");
#endif

for (int i=0; i<=15; i++)
shift[i] = 0;
result.write(0);
output_data_ready.write(false);
wait();

// main functionality
index=0;

while(1) {
output_data_ready.write(false);
do
{
wait();
}while ( !(input_valid == true) );
sample_tmp = sample.read();
acc = sample_tmp*coefs[0];

for(int i=14; i>=0; i--) {
/* this would be an unrolled loop */
pro = shift[i]*coefs[i+1];
acc += pro;
};

for(int i=14; i>=0; i--) {
/* this would be an unrolled loop */
shift[i+1] = shift[i];
};

shift[0] = sample_tmp;
// write output values
result.write((int)acc);
output_data_ready.write(true);/*
myfile << "shift[xxxxxx]";
myfile << "index=" << index << endl;
cout << "index=" << index << endl;*/
#ifdef FILE_WRITE
// fprintf(fp_real,"%d \n", tmp_out);
#endif
index++;
wait();
};
}