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                ## fdopen ## 將文件描述詞轉為文件指針 ### 相關函數 ### fopen,open,fclose ### 表頭文件 ### ``` #include<stdio.h> ``` ### 定義函數 ### ``` FILE *fdopen(int fildes, const char *mode); ``` ### 函數說明 ### fdopen()會將參數fildes 的文件描述詞,轉換為對應的文件指針后返回。參數mode 字符串則代表著文件指針的流形態,此形態必須和原先文件描述詞讀寫模式相同。關于mode 字符串格式請參考fopen()。 ### 返回值 ### 轉換成功時返回指向該流的文件指針。失敗則返回NULL,并把錯誤代碼存在errno中。 ### 范例 ### ``` #include<stdio.h> main() { FILE * fp =fdopen(0,”w+”); fprintf(fp,”%s\n”,”hello!”); fclose(fp); } ``` ### 執行 ### ``` hello! ```
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