c - 文件读取和字符计数

Question

我正在尝试读入文件，然后按字符输出文件。我希望用户输入一个数字，该数字将是要显示的行数。

如果没有以下行，我的代码将显示整个文本文件。if (y == lineCount) 中断;

当计算的换行符数量等于用户输入的数量时，该行应该中断循环。

我可以计算 newLine 字符的数量并显示它，但是当我尝试在达到一定数量的 newLine 后打破循环时，代码会在 1 个字符后中断

#include <stdio.h>

int main ( int argc, char *argv[] )
{
    FILE *file = fopen( argv[1], "r" );
    int lineCount, x, y;

    printf("enter a number of lines of lines to be displayed\n");
    scanf("&d", &y);


    while  ( ( x = fgetc( file )) != EOF )  //read characters
    {
        printf( "%c", x );       //print character

        if (x == '\n')           //check for newline character
            lineCount++;    

        if (y == lineCount)      //check for newLine character
            break;               //??? y = lineCount after 1 character???
    }

    printf( "%d lines in the text file\n", lineCount );  //testing the newline characters was being read

   fclose( file );
}

Answer 1

您需要 scanf("%d", &y) 而不是 scanf("d", &y)。