c语言入门经典（美。霍顿）习题：输入日月年，输出日月年。输出格式为：例如输入12，12，2003，输入12th，December，2003.
大家看看有我这么编程的么。
有好多错啊，有没有更好的算法。
#include<stdio.h>
int main(void)
{
     int   year;
     char month,date;
     scanf("%c%c%d",&date,&month,&year);
     if(date=='1')
        date='1st';
     if(date=='2')
        date='2nd';
     if(date=='3')
        date='3rd';
     if(date=='4')
        date='4th';
     if(date=='5')
        date='5th';
     if(date=='6')
        date='6th';
     if(date=='7')
        date='7th';
     if(date=='8')
        date='8th';
     if(date=='9')
        date='9th';
     if(date=='10')
        date='10th';
     if(date=='11')
        date='11st';
     if(date=='12')
        date='12nd';
     if(date=='13')
        date='13rd';
     if(date=='14')
        date='14th';
     if(date=='15')
        date='15th';
     if(date=='16')
        date='16th';
     if(date=='17')
        date='17th';
     if(date=='18')
        date='18th';
     if(date=='19')
        date='19th';
     if(date=='20')
        date='20th';
     if(date=='21')
        date='21st';
     if(date=='22')
        date='22nd';
     if(date=='23')
        date='23rd';
     if(date=='24')
        date='24th';
     if(date=='25')
        date='25th';
     if(date=='26')
        date='26th';
     if(date=='27')
     date='27th';
     if(date=='28')
        date='28th';
     if(date=='29')
        date='29th';
     if(date=='30')
        date='30th';
     if(date=='31')
        date='31st';
switch(month)
     {case'1':
         month='January';
     break;
     case'2':
         month='February';
     break;
     case'3':
         month='March';
     break;
     case'4':
         month='April';
     break;
     case'5':
         month='May';
     break;
     case'6':
         month='June';
     break;
     case'7':
         month='July';
     break;
     case'8':
         month='August';
     break;
     case'9':
         month='September';
     break;
     case'10':
         month='October';
     break;
     case'11':
         month='November';
     break;
     case'12':
         month='December';
     break;
     default:
         printf("input erro");
     break;
      }
     printf("%c%c%d",date,month,year);
     return 0;
}

用数组。

楼主很强大，拜服～～
给你写一个

#include <stdio.h>

int main() {
    int d, m, y;
    char * months[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}, 
            * s[4] = {"st", "nd", "rd", "th"};
    printf("Give me a date (dd, mm, yyyy) ");
    scanf(" %d %d %d", &d, &m, &y);
    printf("%d%s %s, %d\n", d, (d % 10 > 4) || (d % 10 == 0) || (d / 10 == 1) ? s[3] : s[d % 10 - 1], months[m - 1], y);
    return 0;
}

[ 本帖最后由 voidx 于 2011-4-21 22:31 编辑 ]

up

[ 本帖最后由 gino86 于 2011-4-21 21:06 编辑 ]

超强大的码，先拜下，我拿过来练练手，我也在学习阶段。楼主动手意识超强啊。

这个是要我们自己把握数据范围的，现在我正写个能判断的。
    int d,m,y;
    printf("请输入日期");
    cin >> d;
    printf("请输入月份");
    cin >> m;
    printf("请输入年份");
    cin >> y;
    printf("日月年为 %d-%d-%d",d,m,y);

#include"stdio.h"
int main()
{
    char *day[12]={"st","nd","rd","th","th","th",
    "th","th","th","th","st","nd"};
    char *month[12]={"January","February","March","April","May",
    "June","July","August","September","October","November","December"};
    char *p,*pp;
    int da_y,mont_h,year;
    printf("Input:\n");
    scanf("%d%d%d",&da_y,&mont_h,&year);
    p=*(day+da_y-1);
    pp=*(month+mont_h-1);
    printf("%d%s,%s,%d",da_y,p,pp,year);
    return 0;
    }

看来我的落后了！！

#include<stdio.h>
int main(void)
{
    int year,month,date,d;
    char mon[12][10]={"January","February","March","April","May","June","July","August","September","October","November","December"};
    char da[4][3]={"st","nd","rd","th"};
    scanf("%d%d%d",&date,&month,&year);
    for(;date!=0&&month!=0&&year!=0;)//日月年有一个是0即停止循环输入
    {
        if(date>=11&&date<=20)
            d=4;
        else{
        d=date%10;
        if(d>3) d=4;
        }
      printf("%d%s,%s,%d\n",date,da[d-1],mon[month-1],year);
      scanf("%d%d%d",&date,&month,&year);
    }
return 0;
}

#include <iostream>
using namespace std;
int a[3];
int dmy();

int _tmain(int argc, _TCHAR* argv[])
{
    int i,n;
    for(i=0;i<3;i++)
    {
        printf("请输入一个数据");
        cin >> n;
        a[i]=n;
    }
     dmy();
    return 0;
}
int dmy()
{
    int d,m,y;
    d=a[0];
    m=a[1];
    y=a[2];
    if(d<0 || d>31)
    {
        printf("日期超出范围\n");
        return 0;
    }
    if(m<0 || m>12)
    {
        printf("月份超出范围\n");
        return 0;
    }
    if(y<1000 || y>9999)
    {
        printf("年份超出范围\n");
        return 0;
    }
    cout << d << m << y << endl;
    return 0;
}
这个程序能根据你输入的数值自动返回信息并退出，如果输入不正确，即返回信息并退出；

顺便说下7楼的代码有误，像12 12 2003应该输出12th,December,2003,而不是12nd，December,2003