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c语言中fread函数
C语言中的fread()函数 (fread() function in C)
Prototype:
原型：
代码语言：javascript复制 size_t fread(void *buffer, size_t length, size_t count, FILE *filename);Parameters:
参数：
代码语言：javascript复制 void *buffer, size_t length, size_t count, FILE *filenameReturn type: size_t
返回类型： size_t
Use of function:
使用功能：
The prototype of the function fread() is:
函数fread()的原型为：
代码语言：javascript复制 size_t fread(void *buffer, size_t length, size_t count, FILE *filename);In the file handling, through the fread() function, we read the count number of objects of size length from the input stream filename to the array named buffer. Its returns the number of objects being read from the file. If lesser no of objects are read or EOF is encountered before then it will give an error.
在文件处理中，通过fread()函数 ，我们从输入流文件名到名为buffer的数组读取大小为长度的对象的计数 。 它返回从文件中读取的对象数。 如果较少的对象没有被读取或在此之前遇到EOF ，则它将给出错误。
C语言中的fread()示例 (fread() example in C)
代码语言：javascript复制#include <stdio.h>
#include <stdlib.h>
int main(){
FILE *f;
//initialize the arr1 with values
int arr1[5]={
1,2,3,4,5};
int arr2[5];
int i=0;
//open the file for write operation
if((f=fopen("includehelp.txt","w"))==NULL){
//if the file does not exist print the string
printf("Cannot open the file...");
exit(1);
}
//write the values on the file
if((fwrite(arr1,sizeof(int),5,f))!=5){
printf("File write error....n");
}
//close the file
fclose(f);
//open the file for read operation
if((f=fopen("includehelp.txt","r"))==NULL){
//if the file does not exist print the string
printf("Cannot open the file...");
exit(1);
}
//read the values from the file and store it into the array
if((fread(arr2,sizeof(int),5,f))!=5){
printf("File write error....n");
}
fclose(f);
printf("The array content is-n");
for(i=0;i<5;i ){
printf("%dn",arr2[i]);
}
return 0;
}Output
输出量
翻译自: https://www.includehelp.com/c-programs/fread-function-in-c-language-with-example.aspx
c语言中fread函数
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