用 C 语言打印文件的某一行

Question

我正在尝试用c打印文件的某一行。到目前为止，我认为我已成功读取文本文件的第 8 行，但我的问题是如何使用此代码打印该行？

谢谢！！

这是到目前为止的代码：

int lineNumber = 8;
static const char filename[] = "Text.txt";
FILE *file = fopen(filename, "r");
int count = 0;
if ( file != NULL )
{
    char line[256]; /* or other suitable maximum line size */
    while (fgets(line, sizeof line, file) != NULL) /* read a line */
    {
        if (count == lineNumber)
        {
            //use line or in a function return it
            //in case of a return first close the file with "fclose(file);"
        }
        else
        {
            count++;
        }
    }
    fclose(file);
}

Answer 1

这工作得很好。

您是否缺少主函数，或者它只是您发布的代码片段？

int lineNumber = 8;
static const char filename[] = "Text.txt";
int main() 
{
    FILE *file = fopen(filename, "r");
    int count = 0;
    if ( file != NULL )
    {   
        char line[256]; /* or other suitable maximum line size */
        while (fgets(line, sizeof line, file) != NULL) /* read a line */
        {   
            if (count == lineNumber)
            {   
                //use line or in a function return it
                //            //in case of a return first close the file with "fclose(file);"
            printf("n str %s ", line);
            fclose(file);
            return 0;
            }   
            else
            {   
                count++;
            }   
        }   
        fclose(file);
    }   
return 0;
}