Write a program which asks user to enter a filename and then reads
numbers from that file until end of file is reached.
When the end of file is reached program prints the sum of numbers
and the amount of numbers that was read from the file.

codeblocks调试没问题，一运行程序就直接死掉。。
请问哪里错了。。


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

#define MY_FILENAME "numbers.txt"
#define LINESIZE 80
int main()
{
    FILE *fp;
    char *filename="numbers.txt",*fileinput,*fileptr;
    int count=0;
    int value=0;
    double sum=0;
    char line[LINESIZE];
    printf("Please enter a filename!\n");
    scanf("%s",fileinput);
    fileptr=strstr(filename,fileinput);
    if (fileptr)
    {
        fp=fopen("numbers.txt","r");
        if (fp==NULL)
        {
            printf("Unable to open %s\n", MY_FILENAME);
        }
        else
            printf("numbers from %s...\n",MY_FILENAME);
        while (!feof(fp))
        {
            if (fgets(line,LINESIZE,fp)!=NULL)
            {
                if (sscanf(line,"%d",&value)==1)
                {
                    sum+=value;
                    count++;
                    printf("Read %d\n",value);
                }
                else
                {
                    printf("Invalid line\n");
                }
            }
        }
        fclose(fp);
        printf("the sum of %d numbers from %s is %f\n",count,MY_FILENAME,sum);
    }
    else
        printf("the file doesn't exist");
    return 0;
}

fileinput请开辟内存。。。。 scanf("%s",fileinput);

好像是scanf不能给指针赋值？ 那看输入的字符串和 已经储存的字符串是否匹配应该怎么写啊，strstr好像只能用指针哦。

能不能举个例子啊，谢谢

请楼主直接把要实现的具体细节给出来吧。

题目就是要输入个文件名，打开文件，将所有数字相加求和并显示出一共有多少个数字

我的问题是文件名的匹配怎么写
如果是strstr的话只能用指针
而scanf又不能直接对指针赋值
应该怎么做，谢谢

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

#define MY_FILENAME "numbers.txt"
#define LINESIZE 80
int main()
{
    FILE *fp;
    char *filename="numbers.txt",*fileinput,*fileptr;
    int count=0;
    int value=0;
    double sum=0;
    char line[LINESIZE];
    fileinput = (char *)malloc(80*sizeof(char));//这里你可以根据你的需要改变大小，我暂定80，呵呵~~
    printf("Please enter a filename!\n");
    scanf("%s",fileinput);
    fileptr=strstr(filename,fileinput);
    if (fileptr)
    {
        fp=fopen("numbers.txt","r");
        if (fp==NULL)
        {
            printf("Unable to open %s\n", MY_FILENAME);
        }
        else
            printf("numbers from %s...\n",MY_FILENAME);
        while (!feof(fp))
        {
            if (fgets(line,LINESIZE,fp)!=NULL)
            {
                if (sscanf(line,"%d",&value)==1)
                {
                    sum+=value;
                    count++;
                    printf("Read %d\n",value);
                }
                else
                {
                    printf("Invalid line\n");
                }
            }
        }
        fclose(fp);
        printf("the sum of %d numbers from %s is %f\n",count,MY_FILENAME,sum);
    }
    else
        printf("the file doesn't exist");
    free(fileinput);
    return 0;
}
我试了下，应该没问题，不好意思，前面在看电影，让lz久等了，sorry~~

Write a program which asks user to enter a filename and then reads
numbers from that file until end of file is reached.
When the end of file is reached program prints the sum of numbers
and the amount of numbers that was read from the file.
楼主难道在看英文书 ？  我看了你几个帖子类  都是英文的。。。。。

老师给的题目是英文的。。

你们老师真牛B 。。。。。。