8.1.5

#include <iostream>
#include <cmath>
#include <string.h>


using namespace std;

void trimRight(char a[])
{
    int length=strlen(a);
    for (int i=length-1;a[i]==' ';i--)
    {
        if (a[i-1]!=' ') a[i]=0;
    }
}

int main()
{
    char str[30]="asdas  dasda       ";
    trimRight(str);
    strcat(str,"OK");
    cout<<str;
    return 0;
}