C语言完成的一个万年历小程序（附代码）

(year%400 == 0)) /*闰年*/ { for(i=0; i<29; i++) { weekday = (firstday + i)%7; printf("%-3d",i+1); if(weekday == Sat) { printf("\n"); } } break; } else /*平年*/ { for(i=0; i<28; i++) { weekday = (firstday + i)%7; printf("%-3d",i+1); if(weekday == Sat) { printf("\n"); } } break; } } case 4: case 6: case 9: case 11: { for(i=0; i<30; i++) { weekday = (firstday + i)%7;/*计算该天是星期几*/ printf("%-3d",i+1); if(weekday == Sat) { printf("\n");/*如果是星期六，则换行*/ } } break; } } } void date_print(int month, int year) { int firstday; firstday = makesure_firstday_weekday(month, year); print_in_turn(month, firstday, year); printf("\n"); } void main_month(int month, int year) { first_line_print(month, year); week_print(); date_print(month, year); printf("\n\n"); } void main_calendar(int year) { int i; for(i=1; i<=12; i++) { main_month(i, year); } } int main() { int year; printf("请输入年份：year = "); scanf("%d",&year); printf("\n"); while(year < 1902) { printf("请输入大于1901的年份\n"); printf("请输入年份：year = "); scanf("%d",&year); printf("\n"); } main_calendar(year); scanf(" "); return 0; }