我希望我的C程序要求用户输入要打开的文件名,并将该文件的内容打印到屏幕上。我正在学习C教程,目前已经有了以下代码。但是当我执行它时,实际上并没有让我输入文件名。(我得到了“按任意键继续”的提示,我正在使用CodeBlocks)
我在这里做错了什么?
我在这里做错了什么?
#include <stdio.h>
int main ( int argc, char *argv[] )
{
printf("Enter the file name: \n");
//scanf
if ( argc != 2 ) /* argc should be 2 for correct execution */
{
/* We print argv[0] assuming it is the program name */
printf( "usage: %s filename", argv[0] );
}
else
{
// We assume argv[1] is a filename to open
FILE *file = fopen( argv[1], "r" );
/* fopen returns 0, the NULL pointer, on failure */
if ( file == 0 )
{
printf( "Could not open file\n" );
}
else
{
int x;
/* Read one character at a time from file, stopping at EOF, which
indicates the end of the file. Note that the idiom of "assign
to a variable, check the value" used below works because
the assignment statement evaluates to the value assigned. */
while ( ( x = fgetc( file ) ) != EOF )
{
printf( "%c", x );
}
fclose( file );
}
}
return 0;
}