如何创建“x”文件尺寸？ [英] How to create file of "x" size?

问题描述

如何在c中设置文件的大小？我会打这个吗？

解决方案

是的，你会在fopen之后做到这一点 - 你可以创建所谓的稀疏文件

  #include< stdio.h> 
 int main（void）{
 int X = 1024 * 1024  -  1; 
 FILE * fp = fopen（myfile，w）; 
 fseek（fp，X，SEEK_SET）; 
 fputc（'\0'，fp）; 
 fclose（fp）; 
 
 
 
 $ b $ p 
 $ b这个应该为你创建一个X字节的文件，情况下是1MB 
 
How do I set the size of a file in c ? Would I do this after I fopen?
解决方案
Yes you would do it after fopen - you can create what is know as a sparse file
#include <stdio.h>
int main(void) {
        int X = 1024 * 1024 - 1;
        FILE *fp = fopen("myfile", "w");
        fseek(fp, X , SEEK_SET);
        fputc('\0', fp);
        fclose(fp);
}
That should create you a file for X Byte for whatever you need, in this case it's 1MB

                        
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