读取包含矩阵的ASCII文本文件到二维数组（C语言）

Question

I have an ASCII file containing a matrix of real numbers. I want to read this matrix into a 2-D array in the C language. The ASCII file contains the 4x3 matrix looks like this:

2 3 4
4 5 6.7
3 4 8.9
3 4 5.9

Can anyone suggest a quick way to do this? I have googled this but all solutions I see are pretty convoluted.

Answer 1

What about:

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

int main(void)
{
    double matrix[4][3];
    int i, j;
    for (i = 0; i < 4; i++)
    {
        for (j = 0; j < 3; j++)
        {
            if (scanf("%lf", &matrix[i][j]) != 1)
            {
                fprintf(stderr, "Failed to read matrix[%d][%d]\n", i, j);
                exit(1);
            }
        }
    }

    for (i = 0; i < 4; i++)
    {
        for (j = 0; j < 3; j++)
        {
            printf("%6.2f", matrix[i][j]);
        }
        putchar('\n');
    }

    return 0;
}

Example output

  2.00  3.00  4.00
  4.00  5.00  6.70
  3.00  4.00  8.90
  3.00  4.00  5.90