Matlab 和 C 动态开辟、存储和相互文件读取的测试代码

% MatlabFileTest.m

a=10;
b=20;
A=zeros(a,b);

k=0;
for j=1:b
    for i=1:a
        k=k+1;
        A(i,j)=k;
    end
end
% A(i,j), where i indicates row index, j indicates collumn index

filename = sprintf('InputFile.raw');
fid = fopen(filename,'wb');
fwrite(fid,A,'double');
fclose(fid);
% save the 2D matrix column by column, i.e. A(:,1),A(:,2),...,A(:,b)
% In matlab A(i,j)=A((i-1)*Na+j)

fid=fopen(filename,'rb');
B=fread(fid,[a,b],'double');
fclose(fid);
% read the 2D matrix column by column, i.e. A(:,1),A(:,2),...,A(:,b)
% In matlab B(i,j)=B((i-1)*Na+j)

imagesc(B);
colorbar;


%%
filename = sprintf('OutputFile2');
fid=fopen(filename,'rb');
C=fread(fid,[a,b],'double');
fclose(fid);
imagesc(C);
colorbar;

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// C++FileTest.cpp

#include <stdio.h>
#include <stdlib.h>
#include <iostream>

using namespace std;

int main(void) {


int Na=10; // height of the detector