c - 为什么字符串不存储在各自的数组中？

文件看起来像这样：

trying to read this file#*)will it work?

每当我尝试阅读string和string2时，都会有一些垃圾；我猜我的sscanf是错误的：

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

int main()
{
    char buffer[100];
    char string[100];
    char string2[100];

    FILE *ptr = fopen ("testing8.txt", "r");

    if ((ptr = fopen("testing8.txt", "r"))!= NULL )
        printf("file opened successfuly\ncontinuing program..\n");
    else
    {
        printf("unable to open file, terminating program\n");
        return 0;
    }

    fgets(buffer, 50, ptr);
    //testing to see whether string contains the string or not..

    printf("%s\n",buffer);

    sscanf(ptr,"%[^#*)]#*)%[^?]?", string, string2);
    puts(string);
    puts("\n");

    puts(string2);
    puts("\n");

    fclose(ptr);
    return 0;
}

最佳答案

如果您尝试编译代码版本，则应收到警告

$gcc so_test2.c
so_test2.c: In function ‘main’:
so_test2.c:28: warning: passing argument 1 of ‘sscanf’ from incompatible pointer type
/usr/include/stdio.h:452: note: expected ‘const char * __restrict__’ but argument is of type ‘struct FILE *’
$

因此，我进行了以下更改。这对我有用。

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


int main()
{
        char buffer[100];
        char string[100];
        char string2[100];

        FILE *ptr;//fopen ("testing8.txt", "r");

        if ((ptr = fopen("testing8.txt", "r"))!= NULL )
                printf("file opened successfuly\ncontinuing program..\n");
        else
        {
                printf("unable to open file, terminating program\n");
                return 0;
        }

        if (fgets(buffer, 50, ptr) == NULL)  //added check for success of fgets()
        {
                printf("fgets error\n");
                exit (-1);
        }
        //testing to see whether string contains the string or not..

        printf("%s\n",buffer);

        sscanf(buffer,"%[^#*)]#*)%[^?]?", string, string2); //change ptr to buffer
        puts(string);
        puts("\n");

        puts(string2);
        puts("\n");

        fclose(ptr);
        return 0;

}

关于c - 为什么字符串不存储在各自的数组中？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20937831/