如何从文本文件中读取并存储在c中的矩阵中

Question

首先要说的是我对编码很新,所以请原谅我的错误.我现在正试图读取一个相当大的txt文件,它有大约1000000行和4个cols

56.154 59.365 98.3333 20.11125
98.54 69.3645 52.3333 69.876
76.154 29.365 34.3333 75.114
37.154 57.365 7.0 24.768
........
........

我想全部阅读它们并将它们存储到矩阵中,这是我的代码:

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

int main()
{
  int i;
  int j;

/*matrix*/
int** mat=malloc(1000000*sizeof(int));
for(i=0;i<1000000;++i)
mat[i]=malloc(4*sizeof(int));


  FILE *file;
  file=fopen("12345.txt", "r");

 for(i = 0; i < 1000; i++)
  {
      for(j = 0; j < 4; j++) 
      {
       if (!fscanf(file, " %c", &mat[i][j])) 
           break;
       mat[i][j] -= '0'; /* I found it from internet but it doesn't work*/
       printf("\n",mat[i][j]);
      }

  }
  fclose(file);
}

结果是我的矩阵中没有任何东西.我希望你能帮忙.在此先感谢您的帮助.

---

Answer 1

许多问题,请考虑以下,当然还要看评论

int main()
{
  int i;
  int j;

/*matrix*/
/*Use double , you have floating numbers not int*/

double** mat=malloc(1000000*sizeof(double*)); 
for(i=0;i<1000000;++i)
mat[i]=malloc(4*sizeof(double));


  FILE *file;
  file=fopen("1234.txt", "r");

 for(i = 0; i < 1000; i++)
  {
      for(j = 0; j < 4; j++) 
      {
  //Use lf format specifier, %c is for character
       if (!fscanf(file, "%lf", &mat[i][j])) 
           break;
      // mat[i][j] -= '0'; 
       printf("%lf\n",mat[i][j]); //Use lf format specifier, \n is for new line
      }

  }
  fclose(file);
}