C language output teaching calendar

Enter the semester in the format , Opening time , The total number of weeks can get the curriculum , End with a carriage return .
eg.
semester ：2021-2022_2
Opening time ：2021/11/25
Total weeks ：20

Output results

#include<stdio.h>
#include<windows.h>

int Weekdayofyear(int year);
int Isprime(int year);
int Days(int year, int mouth);
int Weekday(int year, int mouth, int day);
int Max(int year,int mouth);



int main() {
	char title1[] = "		xxxxxx University calendar 		";
	char title2[] = "0000-0000 The school year 0 semester ";
	char tab[60] = " Zhou        One        Two        3、 ... and        Four        5、 ... and        6、 ... and        Japan ";
	char term3;
	char calender[100][8];
	int tempday, tempmouth,flag = 1,b,c,d,e,f,g,h,i,j, cnt = 1, week,term1, term2,year, mouth, day;

	printf(" semester :");
	scanf("%d-%d_%c"