在C中使用fscanf将文本文档的内容扫描到数组中

我需要扫描文本文档的内容，即：

77, 66, 80, 81
40,  5, 35, -1
51, 58, 62, 34
 0, -1, 21, 18
61, 69, 58, 49
81, 82, 90, 76
44, 51, 60, -1
64, 63, 60, 66
-1, 38, 41, 50
69, 80, 72, 75

将每个数字放入一个数组中，每个数字都在它自己的块中，然后读取每个块以确定内容是什么。我觉得我已经完成了处理部分，但我无法确定如何将一个数字分配给数组中的一个块。这是我到目前为止所拥有的

int main()
{
    FILE * marks;
    marks = fopen("marks.txt", "r");
    int marksArray[4][10], x, y, greaterThan70 = 0, between60and69 = 0, between50and59 = 0, between40and49 = 0, lessThan39 = 0, notSubmitted = 0;
    //Scanning in the contents
    while ((fscanf(marks, "%d", &marksArray[x][y])) != EOF)
    {
        x++;
        y++;
    }
    //Processing the array
    for(x = 0; x < 4; x++)
    {
        for(y = 0; y < 10; y++)
        {
            if(marksArray[x][y] == -1)
            {
                notSubmitted++;
            }
            else if(marksArray[x][y] >= 0 && marksArray[x][y] <= 39)
            {
                lessThan39++;
            }
            else if(marksArray[x][y] >= 40 && marksArray[x][y] <= 49)
            {
                between40and49++;
            }
            else if(marksArray[x][y] >= 50 && marksArray[x][y] <= 59)
            {
                between50and59++;
            }
            else if(marksArray[x][y] >= 60 && marksArray[x][y] <= 69)
            {
                between60and69++;
            }
            else
            {
                greaterThan70++;
            }
            break;
        }
    }
    printf("The number of marks greater than 70 was %d", greaterThan70);
    printf("The number of marks between than 60 and 69 was %d", between60and69);
    printf("The number of marks between than 50 and 59 was %d", between50and59);
    printf("The number of marks between than 40 and 49 was %d", between40and49);
    printf("The number of marks less than 39 was %d", lessThan39);
    printf("The number of coursework submissions not handed in was %d", notSubmitted);
}

---

首先，你真的确信C++不能做到这一点吗？< /P> 其次，如果必须用C语言编写，那么应该查看文件并计算每行的行数和逗号数。合计

然后，您可以逐行重复该文件，并计算逗号的数目（如果不是像您的问题中那样每行都有4个数字）

(fscanf(marks, "%d", &marksArray[x][y])

被第一个逗号堵住了。您将需要更多类似于：

(fscanf(marks, "%d, ", &marksArray[x][y])

#include <stdio.h>

int main()
{
FILE * marks;
marks = fopen("in.txt", "r");
int marksArray[4][10], x, y, greaterThan70 = 0, between60and69 = 0, between50and59 = 0, between40and49 = 0, lessThan39 = 0, notSubmitted = 0;
//Scanning in the contents
//No need for EOF if you know the size ahead of time
for(y=0; y<10; y++)
{
  for(x=0; x<3; x++)
  {
    fscanf(marks, "%d, ", &marksArray[x][y]);
  }      
  //To deal with the annoying lack of comma at the end of the line
  //Be wary of EoL variance, the difference between \n and \r\n, bloody windows...
  fscanf(marks, "%d\n", &marksArray[x][y]);
}

//Processing the array
for(x = 0; x < 4; x++)
{
    for(y = 0; y < 10; y++)
    {
        if(marksArray[x][y] == -1)
        {
            notSubmitted++;
        }
        else if(marksArray[x][y] >= 0 && marksArray[x][y] <= 39)
        {
            lessThan39++;
        }
        else if(marksArray[x][y] >= 40 && marksArray[x][y] <= 49)
        {
            between40and49++;
        }
        else if(marksArray[x][y] >= 50 && marksArray[x][y] <= 59)
        {
            between50and59++;
        }
        else if(marksArray[x][y] >= 60 && marksArray[x][y] <= 69)
        {
            between60and69++;
        }
        else
        {
            greaterThan70++;
        }
        break;
    }
}
printf("The number of marks greater than 70 was %d\n", greaterThan70);
printf("The number of marks between than 60 and 69 was %d\n", between60and69);
printf("The number of marks between than 50 and 59 was %d\n", between50and59);
printf("The number of marks between than 40 and 49 was %d\n", between40and49);
printf("The number of marks less than 39 was %d\n", lessThan39);
printf("The number of coursework submissions not handed in was %d\n", notSubmitted);
}

逗号和空格也代表新行，这一点很重要。除了最后一个字符不是以逗号结尾，所以这不太合适

是的，还有这个：

while ((fscanf(marks, "%d", &marksArray[x][y])) != EOF)
{
    x++;
    y++;
}

如果成功，它将以以下模式遍历阵列：

X000
0X00
00X0
000X

您想要的更像：

(fscanf(marks, "%d, ", &marksArray[x][y])

#include <stdio.h>

int main()
{
FILE * marks;
marks = fopen("in.txt", "r");
int marksArray[4][10], x, y, greaterThan70 = 0, between60and69 = 0, between50and59 = 0, between40and49 = 0, lessThan39 = 0, notSubmitted = 0;
//Scanning in the contents
//No need for EOF if you know the size ahead of time
for(y=0; y<10; y++)
{
  for(x=0; x<3; x++)
  {
    fscanf(marks, "%d, ", &marksArray[x][y]);
  }      
  //To deal with the annoying lack of comma at the end of the line
  //Be wary of EoL variance, the difference between \n and \r\n, bloody windows...
  fscanf(marks, "%d\n", &marksArray[x][y]);
}

//Processing the array
for(x = 0; x < 4; x++)
{
    for(y = 0; y < 10; y++)
    {
        if(marksArray[x][y] == -1)
        {
            notSubmitted++;
        }
        else if(marksArray[x][y] >= 0 && marksArray[x][y] <= 39)
        {
            lessThan39++;
        }
        else if(marksArray[x][y] >= 40 && marksArray[x][y] <= 49)
        {
            between40and49++;
        }
        else if(marksArray[x][y] >= 50 && marksArray[x][y] <= 59)
        {
            between50and59++;
        }
        else if(marksArray[x][y] >= 60 && marksArray[x][y] <= 69)
        {
            between60and69++;
        }
        else
        {
            greaterThan70++;
        }
        break;
    }
}
printf("The number of marks greater than 70 was %d\n", greaterThan70);
printf("The number of marks between than 60 and 69 was %d\n", between60and69);
printf("The number of marks between than 50 and 59 was %d\n", between50and59);
printf("The number of marks between than 40 and 49 was %d\n", between40and49);
printf("The number of marks less than 39 was %d\n", lessThan39);
printf("The number of coursework submissions not handed in was %d\n", notSubmitted);
}

---

别听那个家伙说，C语言很棒，是解决所有问题的正确语言。永远

此行：int-marksArray[4][10]有一个错误，因为行在前，列在后。因此，给定示例文件内容，行应为：int marksArray[10][4]，然后需要更新“x”和“y”的“for”循环上的限制值以匹配。读取数组值时，当列计数y达到其“limit”时，代码只应增加行计数x，因为代码对数组的内容不做任何处理，总的来说，最好只有一个int变量，读入该int变量，然后处理该单个值，然后循环读入该单个变量的下一个输入。此行：while fscanfmarks，%d，&marksArray[x][y]！=EOF有一个问题，因为“，”不是空白。因此，可能无法读取超过第一个int值的值。建议一次读取一行fgets，然后使用strtok…，和atoi之类的方法解析该行以提取连续的整数，这也将允许文件中一行中的整数数量不同。您好，感谢您的回复！代码似乎是大部分工作，但它似乎只读取第一行数字，即77、66、80、81。知道为什么它不能沿y轴递增吗？@SexRobomb。是的，这是底部for循环的中断。它在有机会，你知道，循环之前就脱离了循环。只要把它扔掉就行了。还有，投票并接受。我渴望这些积分，晚上睡不着觉，想着如何获得更多。我的朋友们。哈哈，谢谢，整理好了！您赢得了宝贵的代表积分：