万年历程序
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#include int days[]={0,31,59,90,120,151,181,212,243,273,304,334,365}; int month[]={31,28,31,30,31,30,31,31,30,31,30,31}; char weekday[7][7]={"一","二","三","四","五","六","七"}; int week(int y,int m,int d) { int day=0; day=days[m-1]+d-1; return (y-1+(y-1)/4-(y-1)/100+(y-1)/400+day)%7; } void print() { puts("1.Week(查询某天是星期几)"); puts("2.Month(打印某月日历)"); puts("3.Calendar(打印某年日历)"); puts("4.Exit(退出)"); } void printmonth(int y,int m) { int i,j,w; w=(week(y,m,1)+1)%7; puts(" SUN MON TUE WED THU FRI SAT"); for(i=1;i<=w;i++) printf("%5c",' '); for(j=i;j {
printf("%5d",j-i+1); if(j%7==0) puts(""); }
if((j-1)%7) puts(""); }
int main() {
int i,y,m,d,c; char op[1]; print();
while(scanf("%d",&c)==1) {
if(c==1) { do {
puts("请输入年月日（XXXX，XX，XX）"); scanf("%d%d%d",&y,&m,&d);
printf("%4.4d年%2.2d月%2.2d日是星期%s，是否继续查询（Y/N）？\n",y,m,d,weekday[week(y,m,d)]); scanf("%s",op); }while(op[0]=='Y'); print(); }
if(c==2) { do {
puts("请输入要打印的月份（XXXX）"); scanf("%d%d",&y,&m);
printf(" %4.4d年%2.2d月\n",y,m); printmonth(y,m);
puts("是否继续打印（Y/N）？"); scanf("%s",op); }while(op[0]=='Y'); print(); }
if(c==3) { do {
puts("请输入要打印的年份（XXXX）"); scanf("%d",&y);
printf(" %4.4d\n",y); for(i=1;i<=12;i++) {
printf(" %2.2d月\n",i); printmonth(y,i); }
puts("是否继续打印（Y/N）？"); scanf("%s",op); }while(op[0]=='Y'); print(); }
if(c==4) {
puts("是否要真的退出（Y/N）？"); scanf("%s",op); if(op[0]=='Y') return 0;
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