扫描矩阵中的双精度数

Question

我想从文本文件中扫描一个矩阵，但看起来我编写的代码只适用于整数而不是浮点数。

#include <stdlib.h>
#include <stdio.h>
#define MAX 10000

int main(void) {
  FILE *fp;
  int i, j;
  char s[MAX], ch;

  if ((fp = fopen("3.txt", "r")) == NULL) {
    printf("can not open this file!\n");
    exit(1);
  }
  int row = 0;
  while (fgets(s, MAX, fp) != NULL) //Count the line
    row++;

  rewind(fp); //

  int col = 0; //Count the col
  while (ch != '\n') //(ch=fgetc(fp))!='\n'&&(ch=fgetc(fp))!='\r'
  {
    if (ch == ' ') col++;
    ch = fgetc(fp);
  }
  col++; //

  double** jz = malloc(row * sizeof(double*)); //Allocate spaces
  for (i = 0; i < row; i++)
    jz[i] = malloc(col * sizeof(double));

  rewind(fp);

  for (i = 0; i < row; i++) //Read in the data
    for (j = 0; j < col; j++) {
      if (!fscanf(fp, "%lf", &jz[i][j])) {
        break;
      }
    }

  for (i = 0; i < row; i++) //Print the matrix
    for (j = 0; j < col; j++) {
      printf("%lf\t", jz[i][j]);
      if (j + 1 == col) printf("\n");
    }
  fclose(fp);
}

例如，1 * 3矩阵 56.154 59.365 98.3333 似乎全部为 0.0000

我想知道我做错了什么。