A function interface that determines a day of the week

Source: Internet
Author: User

#define RET_OK 0#define RET_ERR 1Charweek_day[8] = {"Monday","Tuesday","Wedsday","Thursday","Friday","Saturday","Sunday"};intJudge_day_of_the_week (intWeek_num,Char*result_week_day) {if(Week_num <1|| Week_num >7)    {printf("Your input is error\n");returnRet_err; }Else{*result_week_day = week_day[week_num-1]; }returnRET_OK;}

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A function interface that determines a day of the week

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