C实例---文件操作（打开文件）

代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main ()
{
    FILE *fp1;
    char file1[30], ch;
    int file_number;
    printf("Please input file : ");
    scanf("%s",file1);
    printf("File 1: ");
    if ( (fp1 = fopen(file1, "rb")) != NULL )
    {
        ch = fgetc(fp1);
        while (ch != EOF)
        {
            putchar(ch);
            ch = fgetc(fp1);
        }
    }
    else
    {
        printf("Line %d : Can not open file\n", __LINE__);
        exit(1);
    }

    fclose(fp1);

    return 0;
}

运行结果：