Question

我有以下文本文件

@1234
5,4
@tfxc
01AAX
11AA1
@tfxc
11AA1
11111

我想从文本文件中读取时忽略@及其背后的数据，而5,4是我在二维数组中存储的矩阵的维数。

这是我的代码：

#include <stdio.h>

FILE *inp;

int main(void) {
    int i, j;
    int y = 0; 
    int x = 0; 
    char comma;
    char arr = 0;

    inp = fopen("App.txt", "r");

    fscanf(inp, "%d", &x); 
    fscanf(inp, "%c", &comma);
    fscanf(inp, "%d", &y);

    char array[y][x];

    for (i = 0; i < y; i++) {
        for (j = 0; j < x; j++) {   
            fscanf(inp, "%c", &arr);

            if ((arr == '1') || (arr == 'X') || (arr == '0') || (arr == 'A')) {
                array[i][j] = arr;
            } else {                           
                j--;
            }
            printf("%c", arr);
        }
    }
}

我怎么能这样做？

Answer 1

使用<script> /*======================================================================== other Part of the Problem ======================================================================*/ function insertIntoTable(){ var idArray = [<% for (int i = 0; i < list1.size(); i++){%>"<%= list1.get(i) %>"<%= i + 1 < list1.size() ? ",":"" %><% } %>]; var nameArray = [<% for (int i = 0; i < list2.size(); i++){%>"<%= list2.get(i) %>"<%= i + 1 < list2.size() ? ",":"" %><% } %>]; var len = idArray.length; for (index = 0; index < len; index=index+1){ var vname = idArray[index]; var vid = nameArray[index]; document.getElementById(vid).value=vname; } } </script>读取行，检查是否应忽略该行，否则解析该行以初始化矩阵。

以下是一个例子：

fgets()

Answer 2

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

int main(void) {
    int i, j;
    int y = 0, x = 0;

    FILE *inp = fopen("App.txt", "r");
    if(!inp){
        perror("fopen\n");
        exit(EXIT_FAILURE);
    }

    while(2 != fscanf(inp, "%d,%d", &x, &y)){
        int ch;
        while((ch=fgetc(inp)) != '\n' && ch !=EOF);//skip
        if(ch == EOF){
            fprintf(stderr, "There is no dimension specified.\n");
            exit(EXIT_FAILURE);
        }
    }
    char array[y][x];
    char format[32];
    sprintf(format, "%%%d[01AX]%%c", x);

    for (i = 0; i < y; i++) {
        int status;
        char newline = 0, buff[x+1];
        status = fscanf(inp, format, buff, &newline);
        if(status == 0 || status == 2 && newline != '\n'){//status 1 is OK
            int ch;
            while((ch=fgetc(inp)) != '\n' && ch !=EOF);//skip

            --i;
            continue;
        }
        if(status == EOF){
            fprintf(stderr, "Necessary data is missing.\n");
            exit(EXIT_FAILURE);
        }
        memcpy(array[i], buff, x);
    }
    fclose(inp);
    //check print
    for (i = 0; i < y; i++) {
        for (j = 0; j < x; j++) {
            putchar(array[i][j]);
        }
        putchar('\n');
    }
    return 0;
}

从文本文件中读取时忽略@

2 个答案: