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C stdio fgets() 函数

❮ C stdio 库


示例

从文件读取一行

FILE *fptr;

// 以读取模式打开文件
fptr = fopen("filename.txt", "r");

// 存储文件内容
char myString[100];

// 读取内容并存储到 myString 中
fgets(myString, 100, fptr);

// 打印文件内容
printf("%s", myString);

// 关闭文件
fclose(fptr);
自己试试 »

定义和用法

The fgets() 函数从文件中读取内容直到下一个换行符,并将它写入 char 数组中。一个 \0 空字符追加到内容的末尾。位置指示器移动到文件中下一个未读取的字符。

The fgets() 函数在 <stdio.h> 头文件中定义。


语法

fgets(char * destination, int size, FILE * fptr);

参数值

参数 描述
destination 必需。指向将写入内容的数组的指针。
size 必需。要写入的数组的大小。该函数最多从文件中读取 size-1 个字符。
fptr 必需。一个文件指针,通常由 fopen() 函数创建。

技术细节

返回值 destination 参数提供的指针相同。

❮ C stdio 库

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