C使用动态分配从文件中读取行和空格

我试图通过使用反向工程过程从文件中读取矩阵。我尝试做的第一部分是使用malloc或calloc创建一个文件。我使用malloc，因为提示用户输入行数或列数。我还制作了最终的矩阵并打印在屏幕上，还有一个用户定义的文件名

我现在遇到的问题是，我能够获取第二部分的文件名，但是一旦找到文件名，程序就会冻结并停止执行下一个操作

下面是我的代码：

//preprocessors

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

//macros

#define STRING_MAX 50

//function prototypes

void printDiagonal (double ** m, int r, int c);

int main (int argc, char * argv [ ])
{
FILE * ptrIn;
FILE * ptrOut;

char inFileName [STRING_MAX];
char outFileName [STRING_MAX];

int row;
int col;

int r;
int c_temp;
int c;

char spaces;
char lines;

int i, j, k;

int ctrSpaces = 0;
int ctrLines = 0;
int ctrH = 0;
int ctrV = 0;

double matrixVals;
double ** matrixIn;
double ** matrixOut;

//get a file name first

printf ("\nEnter a file name >> ");
scanf ("%s", inFileName);

//open the file

ptrIn = fopen (inFileName, "w");

//get matrix dimensions

printf ("\nEnter the row and column sizes >> ");
scanf ("%d", &row);
scanf ("%d", &col);
printf ("\nRows >> %d\nCols >> %d\n\n", row, col);

matrixIn = (double **) malloc (row * sizeof (double *));
if (matrixIn == NULL)
{
    printf ("\nSORRY, NOT ENOUGH MEMORY!\n\n");
    exit (0);
}
for (i = 0; i < row; i ++ )
{
    matrixIn [i] = (double *) malloc (col * sizeof (double));
    if (matrixIn [i] == NULL)
    {
        printf ("\nSORRY, NOT ENOUGH MEMORY!\n\n");
        exit (0);
    }
}

//input the values into the matrix

printf ("\nEnter the values into the matrix >> \n\n");

for (i = 0; i < row; i ++)
{
    for (j = 0; j < col; j ++)
    {
        printf ("\n\nEnter [%d][%d] of [%d][%d] >> ", (i + 1), (j + 1), row, col);
        scanf ("%lf", &matrixIn [i] [j]);
    }
}

//print out the matrix

printf ("\nElements in the matrix >> \n\n");
for (i = 0; i < row; i ++)
{
    for (j = 0; j < col; j ++)
    {
        printf ("%.3lf\t", matrixIn [i][j]);
        fprintf (ptrIn, "%.3lf\t", matrixIn [i][j]);
    }
    printf ("\n");
    fprintf (ptrIn, "\n");
}
printf ("\n");
fprintf (ptrIn, "\n");

for (i = 0; i < row; i ++)
{
    free (matrixIn [i]);
}
free (matrixIn);

fclose (ptrIn);

printf ("\n-----------------------------------------------------------------------------------------------------------------\n\n");

/**------------------------------------------------------------------------------------------------------------------------------------------------------------------------------**/

//now retrieve the file by first getting user input for file name and check that the file exists

FILE_NAME:

printf ("\nEnter the name of file to access >> ");
scanf ("%s", outFileName);
printf ("\nThe name of the file is >> %s\n\n", outFileName);

//now open the file

ptrOut = fopen (outFileName, "r");

//check that the file exists

if (ptrOut == NULL)
{
    printf ("\nSORRY, THE FILE DOES NOT EXIST. PLEASE ENTER A VALID FILE NAME.\n\n");
    goto FILE_NAME;
}

//get the number of rows and columns

for (lines = fgetc (ptrOut); lines != EOF; lines == fgetc (ptrOut))
{
    if (lines == '\t' || lines == ' ')
    {
        ctrLines ++;
        if (lines == EOF)
        {
            break;
        }
    }
}

c_temp = ctrLines;

for (spaces = fgetc (ptrOut); spaces != EOF; spaces = fgetc(ptrOut))
{
    if (spaces == '\n')
    {
        ctrSpaces ++;
        if (spaces == EOF)
        {
            break;
        }
    }
}

r = ctrSpaces;

//total number of rows is:

c = c_temp / r;

printf ("\nNumber of rows >> %d\n\nNumber of columns >> %d\n\n", r, c);

matrixOut = (double **) malloc (r * sizeof (double *));
if (matrixOut == NULL)
{
    printf ("\nSorry, not enough memory!\n\n");
    exit (0);
}

for (i = 0; i < r; i ++)
{
    matrixOut [i] = (double *) malloc (c * sizeof (double));
    if (matrixOut [i] == NULL)
    {
        printf ("\nSorry, not enough memory!\n\n");
        exit (0);
    }
}

for (i = 0; i < r; i ++)
{
    free (matrixOut [i]);
}
free(matrixOut);

fclose (ptrOut);

//reopen the file and get the information from the file

ptrOut = fopen (outFileName, "r");

matrixOut = (double **) malloc (c * sizeof (double *));

for (i = 0; i < r; i++)
{
    matrixOut [i] = (double *) malloc (c * sizeof (double));
}

printf ("\nMatrix from File %s of dimensions %d X %d >>\n\n", outFileName, r, c);

for (i = 0; i < r; i ++)
{
    for (j = 0; j < c; j ++)
    {
        fscanf (ptrOut, "%lf", &matrixVals);
        matrixOut [i] [j] = matrixVals;
        printf ("%.3lf\t", matrixOut [i] [j]);
    }
    printf ("\n");
}
printf ("\n");

for (i = 0; i < r; i ++)
{
    free (matrixOut [i]);
}
free(matrixOut);

fclose (ptrOut);

return (0);
}

//预处理器
#包括
#包括
#包括
#包括
//宏
#定义字符串_MAX 50
//功能原型
无效打印对角线（双**m，整数r，整数c）；
int main（int argc，char*argv[]）
{
文件*ptrIn；
文件*ptrOut；
字符填充名[STRING_MAX]；
字符输出文件名[STRING_MAX]；
int行；
int col；
INTR；
内部温度；
INTC；
字符空间；
字符线；
int i，j，k；
int=0；
int ctrLines=0；
int ctrH=0；
int ctrV=0；
双矩阵；
双**苦参素；
双**矩阵输出；
//首先获取文件名
printf（“\n输入文件名>>”；
scanf（“%s”，填充名）；
//打开文件
ptrIn=fopen（填充名，“w”）；
//获取矩阵维数
printf（“\n输入行和列大小>>”；
scanf（“%d”行和第行）；
scanf（“%d”列和列）；
printf（“\n行>>%d\n列>>%d\n\n”，行，列）；
matrixIn=（双**）malloc（行*大小（双*）；
if（matrixIn==NULL）
{
printf（“\n内存不足！\n\n”）；
出口（0）；
}
对于（i=0；i>\n\n”）；
对于（i=0；i>”中的[%d][%d]，（i+1），（j+1），行，列）；
scanf（“%lf”、&matrixIn[i][j]）；
}
}
//打印出矩阵
printf（“\n矩阵中的元素>>\n\n”）；
对于（i=0；i>”；
scanf（“%s”，outFileName）；
printf（“\n文件名>>%s\n\n”，outFileName）；
//现在打开文件
ptrOut=fopen（出料口名称，“r”）；
//检查文件是否存在
如果（ptrOut==NULL）
{
printf（“\n实际上，该文件不存在。请输入有效的文件名。\n\n”）；
转到文件名；
}
//获取行数和列数
对于（行=fgetc（ptrOut）；行！=EOF；行==fgetc（ptrOut））
{
如果（行=='\t'| |行==''）
{
ctrLines++；
如果（行==EOF）
{
打破
}
}
}
c_温度=中心线；
对于（空格=fgetc（ptrOut）；空格！=EOF；空格=fgetc（ptrOut））
{
如果（空格=='\n'）
{
ctrSpaces++；
if（空格==EOF）
{
打破
}
}
}
r=空间；
//总行数为：
c=c_温度/r；
printf（“\n行数>>%d\n\n列数>>%d\n\n”，r，c）；
matrixOut=（双**）malloc（r*sizeof（双*）；
if（matrixOut==NULL）
{
printf（“\n内存不足！\n\n”）；
出口（0）；
}
对于（i=0；i>\n\n”，输出文件名，r，c）；
对于（i=0；i

这是我的输出： .

为了澄清我的问题

---

谢谢

多亏了用户3629249，我终于做到了。我只需要将读取行号和读取行号这两个操作分开。对于行号，我必须从总行数中减去1，因为它在

EOL

之后增加了一个额外的

\0

这是我最后的代码（以及我最初没有提到的函数），用于打印出一个方阵的主对角线和“次”对角线

 //preprocessors

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

//macros

#define STRING_MAX 50

//function prototypes

void printMajorDiagonal (double ** m, int r, int c);
void printMinorDiagonal (double ** m, int r, int c);

int main (int argc, char * argv [ ])
{
FILE * ptrIn;
FILE * ptrOut;

char inFileName [STRING_MAX];
char outFileName [STRING_MAX];

int row;
int col;

int r;
int c_temp;
int c;

char spaces;
char lines;
char ch;

int i, j, k;

int ctrSpaces = 0;
int ctrLines = 0;
int ctrH = 0;
int ctrV = 0;
int charCount = 0;
int lineCount = 0;

double matrixVals;
double ** matrixIn;
double ** matrixOut;

//get a file name first

printf ("\nEnter a file name >> ");
scanf ("%s", inFileName);

//open the file

ptrIn = fopen (inFileName, "w");

//get matrix dimensions

printf ("\nEnter the row and column sizes >> ");
scanf ("%d", &row);
scanf ("%d", &col);
printf ("\nRows >> %d\nCols >> %d\n\n", row, col);

matrixIn = (double **) malloc (row * sizeof (double *));
if (matrixIn == NULL)
{
    printf ("\nSORRY, NOT ENOUGH MEMORY!\n\n");
    exit (0);
}
for (i = 0; i < row; i ++ )
{
    matrixIn [i] = (double *) malloc (col * sizeof (double));
    if (matrixIn [i] == NULL)
    {
        printf ("\nSORRY, NOT ENOUGH MEMORY!\n\n");
        exit (0);
    }
}

//input the values into the matrix

printf ("\nEnter the values into the matrix >> \n\n");

for (i = 0; i < row; i ++)
{
    for (j = 0; j < col; j ++)
    {
        printf ("\n\nEnter [%d][%d] of [%d][%d] >> ", (i + 1), (j + 1), row, col);
        scanf ("%lf", &matrixIn [i] [j]);
    }
}

//print out the matrix

printf ("\nElements in the matrix >> \n\n");
for (i = 0; i < row; i ++)
{
    for (j = 0; j < col; j ++)
    {
        printf ("%.3lf\t", matrixIn [i][j]);
        fprintf (ptrIn, "%.3lf\t", matrixIn [i][j]);
    }
    printf ("\n");
    fprintf (ptrIn, "\n");
}
printf ("\n");
fprintf (ptrIn, "\n");

for (i = 0; i < row; i ++)
{
    free (matrixIn [i]);
}
free (matrixIn);

fclose (ptrIn);

printf ("\n-----------------------------------------------------------------------------------------------------------------\n\n");

/**------------------------------------------------------------------------------------------------------------------------------------------------------------------------------**/

//now retrieve the file by first getting user input for file name and check that the file exists

FILE_CHECK:

printf ("\nEnter the name of file to access >> " );
scanf ("%s", outFileName);
printf ("\nThe name of the file is >> %s\n\n", outFileName);

//now open the file

ptrOut = fopen (outFileName, "r");
if (ptrOut == NULL)
{
    printf ("Sorry, the file does not exist. Re-enter another file-name.\n\n");
    goto FILE_CHECK;
}

//read lines first - total number of lines == total number of rows

for (lines = getc (ptrOut); lines != EOF; lines = getc (ptrOut))
{
    if (lines == '\n')
    {
        ctrLines ++ ;
    }
}

r = ctrLines - 1;

matrixOut = (double **) malloc (r * sizeof (double *));
if (matrixOut == NULL)
{
    printf ("\nSorry, not enough memory!\n\n");
    exit (0);
}

free (matrixOut);

printf ("\nRows >> %d\n\n", r);

/*******************************************************************************************************************************************/

//open the file again to count columns

ptrOut = fopen (outFileName, "r");

for (spaces = getc (ptrOut); spaces != EOF; spaces = getc (ptrOut))
{
    if (spaces == ' ' || spaces == '\t' || spaces == '\b')
    {
        ctrSpaces ++ ;
    }
}

c_temp = ctrSpaces;

c = c_temp / r;

printf ("\nCols >> %d\n\n", c);

for (i = 0; i < r; i ++)
{
    matrixOut [i] = (double *) malloc (c * sizeof (double));
    if (matrixOut [i] == NULL)
    {
        printf ("\nSorry, not enough memory!\n\n");
        exit (0);
    }
}

for (i = 0; i < r; i ++ )
{
    free (matrixOut [i]);
}
fclose (ptrOut);

//reopen the file again to read the matrix elements line by line

ptrOut = fopen (outFileName, "r");

matrixOut = (double **) malloc (r * sizeof (double *));

for (i = 0; i < r; i ++)
{
    matrixOut [i] = (double *) malloc (c * sizeof (double));
}

//print out the matrix here

printf ("\nThe matrix in the file %s of size %d x %d.\n\n", outFileName, r, c);

for (i = 0; i < r; i ++)
{
    for (j = 0; j < c; j++)
    {
        fscanf (ptrOut, "%lf", &matrixVals);
        matrixOut [i] [j] = matrixVals;
        printf ("%.3lf\t", matrixOut [i] [j]);
    }
    printf ("\n");
}
printf ("\n");

printMajorDiagonal (matrixOut, r, c);
printMinorDiagonal (matrixOut, r, c);

for (i = 0; i < r; i ++)
{
    free (matrixOut [i]);
}
free (matrixOut);

fclose (ptrOut);

return (0);
}

//function definitions

void printMajorDiagonal (double ** m, int r, int c)
{
//prints out the major diagonal
int i, j;
if (r == c)
{
    printf ("\nMajor Diagonal >> \n\n");
    for (i = 0; i < r; i ++)
    {
        printf ("%.3lf\t", m [i] [i]);
    }
    printf ("\n");
}
else if (r != c)
{
    printf ("\nThe major diagonal cannot be printed since the given matrix is not a square matrix.\n\n");
}
}

void printMinorDiagonal (double ** m, int r, int c)
{
//prints out the opposite "minor" diagonal
int i, j;
if (r == c)
{
    printf ("\nMinor Diagonal >> \n\n");
    for (i = 0; i < r; i ++)
    {
        printf ("%.3lf\t", m [r - i - 1] [i]);
    }
    printf ("\n");
}
else if (r != c)
{
    printf ("\nThe major diagonal cannot be printed since the given matrix is not a square matrix.\n\n");
}
}

//预处理器
#包括
#包括
#包括
#包括
//宏
#定义字符串_MAX 50
//功能原型
无效打印主对角线（双**m，整数r，整数c）；
无效打印格式（双**m，整数r，整数c）；
int main（int argc，char*argv[]）
{
文件*ptrIn；
文件*ptrOut；
字符填充名[STRING_MAX]；
字符输出文件名[STRING_MAX]；
int行；
int col；
INTR；
内部温度；
INTC；
字符空间；
字符线；
char ch；
int i，j，k；
int=0；
int ctrLines=0；
int ctrH=0；
int ctrV=0；
int charCount=0；
在里面