读取txt文件中的数字列表并存储到数组C

Question

我在阅读数字时遇到问题。运行程序后一切正常，但数组中没有数字。我尝试了不同的方法在文件中写入数字，但没有结果。

FILE *myFile;
myFile = fopen("numbers.txt", "r");
if (myFile==NULL)
{
    printf("Error Reading File\n");
}
else
{
tek=0;
for (i=0;i++)
{
//  tek=fgetc(myFile);
    fscanf(myFile,"%d",&tek);
    if (tek!=EOF)
    {
        redica[i]=tek;
    }
    else
    {
        break;
    }
}
getch();

Answer 1

Consider the following modification to your code:

#include <stdio.h>

int main(void) {
    int tek;
    int radica[50];

    // open file
    FILE *myFile = fopen("numbers.txt", "r");
    // if opening file fails, print error message and exit 1
    if (myFile == NULL) {
        perror("Error: Failed to open file.");
        return 1;
    }

    // read values from file until EOF is returned by fscanf
    for (int i = 0; i < 50; ++i) {
        // assign the read value to variable (tek), and enter it in array (radica)
        if (fscanf(myFile, "%d", &tek) == 1) {
            radica[i] = tek;
        } else {
            // if EOF is returned by fscanf, or in case of error, break loop
            break; 
        }
    }

    // close file
    fclose(myFile);
    return 0;
}

Any number read by fscanf will be assigned to tek , and entered in the array radica , until fscanf returns EOF , at which point the loop breaks. As already mentioned, to determine when end of file is reached, it is not the variable tek that is compared to EOF but rather the return of fscanf .

Answer 2

我遇到了同样的问题，因为“strcmp”只验证了 7 个字符（+1 是字符串“\\0”的结尾），我通过使用“strncmp”解决了这个问题，基本上是相同的功能，但它接受第三个字符参数，要比较的字符数，在我的情况下，我使用strncmp(string1, string2, strlen(string1))或将strlen(string1)更改为要比较的字符数。