Question

我想读一下档案中的所有分类账,并将其放在一阵列中。

 ./prog input.txt

例如,在投入中,txt包含以下数字:

 -6 8 9 0 45 54 67 0 12
 23 3 -25 12 67 6 9 -9

如何在不事先知道愤怒人数的情况下这样做

感谢任何人回答!

Answer 1

Something like this. (Not tested)

while(!feof(inFile)){ //inFile is your pointer to the file opened with fopen()
    fscanf(inFile,"%d",&a[i]); //a is your array
    i++;
}

您的<代码>i可变,您的档案(+1)中的项目数将保持不变,而您的编号则在文件上。

Answer 2

initialize a memory area
- read number in a loop and
- if needed use realloc on the memory area
- add number to array
[use memory area]
release memory

You will need to keep a count of how many elements are already in the array and the maximum number of elements it can have (so you know when it s time to reallocate).

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