读取和写入二进制文件的缓冲区

Question

这里是我的代码截至目前：

#include <stdio.h> 
#include "readwrite.h" 

int main() 
{ FILE* pFile; 
    char buffer[] = {'x' ,'y','z',0}; 
    pFile = fopen("C:\\Test\\myfile.bin","wb"); 

    if (pFile){ 
     fwrite(buffer,1,sizeof(buffer),pFile); 

    printf("The buffer looks like: %s",buffer); 
    } 
    else 
    printf("Can't open file"); 


    fclose(pFile); 
    getchar(); 
    return 0; 
} 

我想写点东西验证我写的文件，然后从文件中读取和验证我读出文件。如何做到这一点最好？我还需要找出一种方法将相同的东西写入2个不同的文件。这甚至有可能吗？

Answer 1

我认为你正在寻找的东西是这样的：

FILE* pFile; 
char* yourFilePath = "C:\\Test.bin"; 
char* yourBuffer = "HelloWorld!"; 
int yorBufferSize = strlen(yourBuffer) + 1; 

/* Reserve memory for your readed buffer */ 
char* readedBuffer = malloc(yorBufferSize); 

if (readedBuffer==0){ 
    puts("Can't reserve memory for Test!"); 
} 

/* Write your buffer to disk. */ 
pFile = fopen(yourFilePath,"wb"); 

if (pFile){ 
    fwrite(yourBuffer, yorBufferSize, 1, pFile); 
    puts("Wrote to file!"); 
} 
else{ 
    puts("Something wrong writing to File."); 
} 

fclose(pFile); 

/* Now, we read the file and get its information. */ 
pFile = fopen(yourFilePath,"rb"); 

if (pFile){ 
    fread(readedBuffer, yorBufferSize, 1, pFile); 
    puts("Readed from file!"); 
} 
else{ 
    puts("Something wrong reading from File.\n"); 
} 

/* Compare buffers. */ 
if (!memcmp(readedBuffer, yourBuffer, yorBufferSize)){ 
    puts("readedBuffer = yourBuffer"); 
} 
else{ 
    puts("Buffers are different!"); 
} 

/* Free the reserved memory. */ 
free(readedBuffer); 

fclose(pFile); 
return 0; 

问候

Answer 2

读取缓存的程序几乎是除“RB”同为读取的二进制和fread()代替fwrite()

记住，你必须知道你要读取缓冲区有多大，并有一定的记忆大小合适准备好接受它