Web一、fread 函数 fread 函数作用 : 从文件中读取若干字节数据到内存缓冲区中 ; fread 函数原型 : size_t fread ( void *buffer, size_t size, size_t count, FILE *stream ); void *buffer 参数 : 将文件中的二进制数据读取到该缓冲区中 ; size_t size 参数 : 读取的 基本单元 字节大小 , 单位是字节 , 一般是 buffer 缓冲的单位大小 ; 如果 buffer 缓冲区是 char 数组 , 则该参数的值是 … WebNov 18, 2024 · #include #include int main (int argc,char *argv []) { FILE *fp1, *fp2; //流指针 char buf [1024]; //缓冲区 int n; //存放fread和fwrite函数的返回值 if (argc 0) { //读源文件，直到将文件内容全部读完*/ if (fwrite (buf, sizeof (char), n, fp2) == -1) { //将读出的内容全部写到目标文件中去 printf ("写如文件发生错误\n"); return 3; /*出错退出*/ } } printf ("从源文件%s …
c++ - using fread to read into int buffer - Stack Overflow
http://www.fread.ink/ WebFeb 10, 2024 · 3. The first size parameter specifies the size of a single record. The second size parameter defines how many records you want to load. fread returns the number of … red bull 2000
Is this the reason why fread/fwrite has 2 `size_t` arguments?
WebThe program below demonstrates the use of fread() by parsing /bin/sh ELF executable in binary mode and printing its magic and class: $ ./a.outELF magic: 0x7f454c46 Class: 0x02 Program source#include #include #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) int WebMay 26, 2024 · char ch1 = getc (fp1); is not need to detect the end, use the fread () return value. @Jean-François Fabre Aside: use int ch1 to distinguish the 257 different return values from fgets (). Avoid naked magic numbers Rather than litter code with 10 here and there, use a named constant. Think big Files can be larger than INT_MAX blocks. WebDec 1, 2024 · The fread function reads up to count items of size bytes from the input stream and stores them in buffer. The file pointer associated with stream (if one exists) is … knee washout cpt