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                ## fgets ## 由文件中讀取一字符串 ### 相關函數 ### open,fread,fscanf,getc ### 表頭文件 ### ``` include<stdio.h> ``` ### 定義函數 ### ``` char *fgets(char *s, int size, FILE *stream); ``` ### 函數說明 ### fgets()用來從參數stream所指的文件內讀入字符并存到參數s所指的內存空間,直到出現換行字符、讀到文件尾或是已讀了size-1個字符為止,最后會加上NULL作為字符串結束。 ### 返回值 ### gets()若成功則返回s指針,返回NULL則表示有錯誤發生。 ### 范例 ### ``` #include<stdio.h> main() { char s[80]; fputs(fgets(s,80,stdin),stdout); } ``` ### 執行 ### ``` this is a test /*輸入*/ this is a test /*輸出*/ ```
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