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                ## atexit ## 設置程序正常結束前調用的函數 ### 相關函數 ### _exit,exit,on_exit ### 表頭文件 ### ``` #include<stdlib.h> ``` ### 定義函數 ### ``` int atexit(void (*function)(void)); ``` ### 函數說明 ### atexit()用來設置一個程序正常結束前調用的函數。當程序通過調用exit()或從main中返回時,參數function所指定的函數會先被調用,然后才真正由exit()結束程序。 ### 返回值 ### 如果執行成功則返回0,否則返回-1,失敗原因存于errno中。 ### 范例 ### ``` #include<stdlib.h> void my_exit(void) { printf(“before exit () !\n”); } main() { atexit (my_exit); exit(0); } ``` ### 執行 ### ``` before exit()! ```
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