my code
////////////////////////////////
#include <stdio.h>
int main()
{
    char string[1000000];
    int len=0;
    char ch;
    int count=0;
    int i;
    char temp;
    int nachalo=-1;
    int konec=-1;
    ch=getchar();
    while(ch!=EOF)
    {

        string[len]=ch;
        len++;
        ch=getchar();
    }
    for(count=0;count<len;count++)
    {
        if(nachalo<0)
            if(((string[count]<='z')&&(string[count]>='a'))||((string[count]<='Z')&&(string[count]>='A')))
                nachalo=count;

        if(nachalo>-1)
            if(!(((string[count]<='z')&&(string[count]>='a'))||((string[count]<='Z')&&(string[count]>='A'))))
                konec=count-1;
        if (konec>-1)
        {
            for(i=nachalo;i<=nachalo+(konec-nachalo)/2;i++)
            {
                temp=string[i];
                string[i]=string[konec-i+nachalo];
                string[konec-i+nachalo]=temp;
            }
            nachalo=-1;
            konec=-1;
        }

    }
    for(i=0;i<len;i++)
        printf("%c",string[i]);

    return 0;
}

Edited by author 14.08.2009 04:52

Your program doesn't work if the last symbol is any English letter, because there is no its "konec".