解答私信@m0_51290874

朴灿烈づ我的快乐病毒、 2022-12-13 12:50 98阅读 0赞

#### 编写程序提示用户输入今天是一周内的哪一天（星期天是0，星期一是1，…，星期六是6）还要提示用户输入今天之后到未来某天的天数，然后显示未来这天是星期几 输出其整数部分） ####

代码块：

#include <stdio.h>
    #include <stdlib.h>
    
    enum Weekday{
        None, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday};
    
    void input(int *day, int *dayspassed);
    void output(int *day, int *dayspassed);
    
    void input(int *day, int *dayspassed){
        
    	printf("Enter today's day: ");
    	scanf_s("%d", day);
    	while(*day < 1 || *day > 7){
        
    		printf("Error!Retry!\nEnter today's day: ");
    		scanf_s("%d", day);
    	}
    	printf("Enter the number of days elapsed since today: ");
    	scanf_s("%d", dayspassed);
    	while(*dayspassed < 1){
        
    		printf("Error!Retry!\nEnter the number of days elapsed since today: ");
    		scanf_s("%d", dayspassed);
    	}
    }//input
    void output(int *day, int *dayspassed){
        
    	int judgeday = (*day + *dayspassed) % 7;
    	printf("Today is ");
    	switch(*day){
        
    	case Monday: printf("Monday "); break;
    	case Tuesday: printf("Tuesday "); break;
    	case Wednesday: printf("Wednesday "); break;
    	case Thursday: printf("Thursday "); break;
    	case Friday: printf("Friday "); break;
    	case Saturday: printf("Saturday "); break;
    	case Sunday: printf("Sunday "); break;
    	default: break;
    	}
    	printf("and the future day is ");
    	switch(judgeday){
        
    	case Monday: printf("Monday\n"); break;
    	case Tuesday: printf("Tuesday\n"); break;
    	case Wednesday: printf("Wednesday\n"); break;
    	case Thursday: printf("Thursday\n"); break;
    	case Friday: printf("Friday\n"); break;
    	case Saturday: printf("Saturday\n"); break;
    	case Sunday: printf("Sunday\n"); break;
    	default: break;
    	}
    }//output
    
    int main()
    {
        
    	int *day = (int*)malloc(sizeof(int));
    	int *dayspassed = (int*)malloc(sizeof(int));
    	input(day, dayspassed);
    	output(day, dayspassed);
    	free(day);
    	free(dayspassed);
    
    	system("pause");
    	return 0;
    }