读取文件时出现段错误 [英] Get a segment fault while reading a file

问题描述

我想读取整个文件内容并打印出来，但是出现段错误，我找不到代码有什么问题...

I want to read the whole file content and print it out , but I get a segment fault , I can't find what's wrong with the code ...

#include <stdio.h>
#include <stdlib.h>
int main()
{
    FILE * file;
    long fsize;
    file = fopen("./input.txt","r");
    if(file != NULL){

        //get file size
        fseek(file,0,SEEK_END);
        fsize = ftell(file);
        rewind(file);

        // print
        char * file_content;
        fgets(file_content,fsize,file);
        puts(file_content);
    }
    else{
        printf("open failure\n");
    }
    fclose(file);

    return 0;
}

推荐答案

您传递给fgets(file_content)的指针未初始化.它应该指向一个足够大的内存块，以包含指定数量的字节(fsize).您可以使用malloc分配内存.

The pointer you pass to fgets (file_content) is uninitialized. It should be pointing to a block of memory large enough to contain the specified number (fsize) of bytes. You can use malloc to allocate the memory.

char* file_content = (char*)malloc(fsize);

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