如何将文件中的网格读入 C 中的二维数组?

How to read a grid from a file into 2 dimensional array in C?

我尝试将文件中的网格读入二维数组。程序编译没有任何错误。这是代码:

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

    FILE* openFile(FILE* file, char* name, char* mode) {
        file = NULL;
        file = fopen(name, mode);
        if(file == NULL) {
            printf("Could not open a file!\n");
            exit(1);
        } else {
            printf("File was opened/created successfully!\n\n");
        }

        return file;
    }

    int main() {
        FILE* file;
        file = openFile(file, "a.txt", "r");

        char c;
        int x, row, column;
        x = row = column = 0;

        int array[2][2];
        for(int i = 0; i < 2; i++) {
            for(int j = 0; j < 2; j++) {
                array[i][j] = 0;
            }
        }

        while(!feof(file) && (c = fgetc(file))) {
            if(c == '\n') {
                row++;
            }

            if(c != '\n' && c!= '\r') {
                x = atoi(&c);
                if(array[row][column] == 0) {
                    array[row][column] = x;
                    printf("array[%d][%d] = %d\n", row, column, array[row][column]);
                    printf("row = %d\n", row);
                    printf("column = %d\n\n", column);
                    column++;
                }
            }
        }

        for(int i = 0; i < row; i++) {
            for(int j = 0; j < column; j++) {
                printf("array[%d][%d] = %d\n", i, j, array[i][j]);
            }
            printf("\n");
        }

        fclose(file);
        return 0;
    }

txt 文件:

    02
    46

程序输出:

    File was opened/created successfully!

    array[0][0] = 0
    row = 0
    column = 0

    array[0][1] = 2
    row = 0
    column = 1

    array[0][0] = 0
    array[0][1] = 2

似乎它只读取了第一行,然后是 feof() returns 它已经到了结尾。我访问了几个网站试图了解问题所在。

谁能解释一下我在哪里犯了错误并给出正确的解决方案?

您没有在更改行时重置列号。文件中的第二行保存在数组 [1][2] 和数组 [1][3] 中,但您不显示它。

while(!feof(file) && (c = fgetc(file))) {
    if(c == '\n') {
        row++;
        column = 0;
    }

这将正常工作。