万年历程序设计.doc

万年历程序设计#include main() void print_head(int x,int y); /*打印头文件*/ void print_month(int x,int y); /*打印月历*/ int days_of_month(int x,int y); /*计算指定年月的天数*/ int leap(int x,int y); /*计算指定年月1号是星期几*/ int i,days,year,month,firstday; char choose; do printf (nnplease input the year(00009999):nn); scanf (%d,&year); if (year9999) printf (WANNING:ERROR,please input again!); while (year9999); printf (nn); do printf (please input the month(012)nnn); scanf (%d,&month); if (month12) printf (WANNING:ERROR,please input again!); while (month12); printf (nn); days=days_of_month(year,month); /*调用函数*/ firstday=leap(year,month); print_head(year,month); print_month(firstday,days); choose=getchar(); printf (nnn); printf(would you like to continue(y/n):nn); scanf(%c,&choose); if (choose=y|choose=Y) main(); days_of_month(int x,int y) int z; switch (y) case 1: case 3: case 5: case 7: case 8: case 10: case 12: z=31;break; case 4: case 6: case 9: case 11: z=30;break; case 2: if (x%4=0&x%100!=0)|(x%400=0) z=29; else z=28;break; return z; leap(int x,int y) int z,i,moday; z=(x+(x-1)/4-(x-1)/100+(x-1)/400)%7; for (i=1;iy;i+) moday=days_of_month(x,i); /*钳套调用函数*/ z=(z+moday)%7; return z; void print_head(int x,int y) printf (nn*nn); printf (tttt%d %dnn,x,y); printf (ttt SUN MON TUE WED THU FRI SATn); printf (ttt); void print_month(int x,int y) int i; char space7= ; for (i=1;i=x;i+) printf (%4c,spacei); for (i=1;i=y;i+