#include <iostream.h>
#include <conio.h>
#include <string.h>
char *upper(char s[],Option u)
{
    int m = 1;
    int t='a'-'A';
    int n=strlen(s);
    if (s[0]>='a'&&s[0]<='z')
        s[0]-=t;
    if (u==All)
        {
            for (m=1;m<=n;m++)
                {
                    if(s[m]!='\0'&&(s[m]>='a'&&s[m]<='z'))
                        {
                            s[m]-=t;
                        }
                }
        }
    if (u == Head)
        {
            for (m=1;m<=n;m++)
                {
                    if (s[m]=='.' || s[m]=='?' || s[m]=='!')
                        {
                            if (s[m+1]!='\0')
                                {
                                    s[m+1]-=t;
                                }
                        }
                }
        }
    if (u == Whead)
        {
            for (m=1;m<=n;m++)
                {
                    if ( s[m]=='.' || s[m]=='?' || s[m]=='!'|| s[m] == ' ' ||
                     s[m] == ','|| s[m] == ':' )
                        {
                            if (s[m+1]!='\0')
                                {
                                    s[m+1]-=t;
                                }
                        }
                }
        }
    return s;
}
void main()
{
    enum Option
    {All,Head,Whead} a,b,c;
    a=All;
    b=Head;
    c=Whead;
    char a[100]="ming tian shi wo men de jie ri,wei shen me ne?ni bu xing." ;
    cout<<upper(a[100],a)<<endl;
    cout<<upper(a[100],b)<<endl;
    cout<<upper(a[100],c)<<endl;
    getch();
}