大家好，又见面了，我是你们的朋友全栈君。如果您正在找激活码,请点击查看最新教程,关注关注公众号 “全栈程序员社区” 获取激活教程,可能之前旧版本教程已经失效.最新Idea2022.1教程亲测有效,一键激活。
Jetbrains全系列IDE使用 1年只要46元 售后保障 童叟无欺
c语言中fread函数
C语言中的fread()函数 (fread() function in C)
Prototype:
原型：
size_t fread(void *buffer, size_t length, size_t count, FILE *filename);
Parameters:
参数：
void *buffer, size_t length, size_t count, FILE *filename
Return 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：
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)
#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("%d\n",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
发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/194507.html原文链接：https://javaforall.net
