C 程序 fscanf 跳过行

Question

这个程序需要一个文件，并且应该将文件内容传输到一个结构中

文件内容为：

11.0,  11.0, 11.0,  14.0
22.4,  22.4, 22.4,  28.9
12.7,  13.8, 14.6,  14.5
23.5,  13.5, 42.5,  21.8
18.0,  16.0, 21.0,  42.9
21.0,  21.0, 21.0,  100.0   

文件的输出是：

22.4,  22.4, 22.4, 28.9
23.5,  13.5, 42.5, 21.8
21.0,  21.0, 21.0, 100.0

它正在跳过文件内容中的每一行，我不知道如何解决这个问题。

#include <stdio.h>

#define MAX_ITEMS 100

struct item {
    double item1;
    double item2;
    double item3;
    double item4;
};

int main(void)
{
    struct item myItems[MAX_ITEMS]; 
    int i = 0;

    FILE *input;
    input = fopen("items.txt", "r");

    if(input == NULL) {
        printf("Error opening file\n");
        return 1;
    }

    while(fscanf(input, " %lf,%lf,%lf,%lf", &myItems[i].item1,&myItems[i].item2,   
             &myItems[i].item3, &myItems[i].item4) == 4) 
    {
       fscanf(input, " %lf,%lf,%lf,%lf", &myItems[i].item1,&myItems[i].item2,    
             &myItems[i].item3, &myItems[i].item4);
       printf("%lf %lf %lf %lf\n", myItems[i].item1, myItems[i].item2,     
             myItems[i].item3, myItems[i].item4);
       i++;
    }

  fclose(input);
  return 0;
}

Answer 1

出现问题是因为您调用了两次fscanf 并且只打印了后者的结果。而是你这样做

while(fscanf(input, " %lf,%lf,%lf,%lf", &myItems[i].item1,&myItems[i].item2,   
             &myItems[i].item3, &myItems[i].item4) == 4) {
     printf("%lf %lf %lf %lf\n", myItems[i].item1, myItems[i].item2,     
             myItems[i].item3, myItems[i].item4);
    i++;
}