Question

How to read numbers from binary file into float array in C++

Answer 1

#include <iostream>
#include <fstream>

using std::cout;
using std::endl;

#define SIZE 3

int main()
{
	float arr[SIZE] = { 0, 0, 0 };
	char filename[] = "d:\\data.bin";

	std::ifstream ifs(filename, std::ios::in | std::ios::binary);
	if (!ifs) {
		cout << "Error open file" << endl;
		exit(1);
	}
	ifs.read((char *)&arr, sizeof(arr));

	for (int i = 0; i < SIZE; i++)
		cout << arr[i] << " ";
	ifs.close();

	cout << endl;

	return 0;
}


/*
run:

3.14 87.91 -12.85

*/

 

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