Delete particular word from string - C++ Program

#include<iostream>
#include<string.h>
#include<stdio.h>
using namespace std;
int main()
{
        int i, j = 0, k = 0;
        char str[100], str1[10][20], word[20];
        cout<<"\n Enter String : ";
        gets(str);

        /* Converting the string into Two Dimensional Array */

        for (i=0; str[i]!='\0'; i++)
        {
                if (str[i]==' ')
                {
                        str1[k][j] = '\0';
                        k++;
                        j=0;
                }
                else
                {
                        str1[k][j]=str[i];
                        j++;
                }
        }
        str1[k][j] = '\0';
        cout<<"\n Which Word You Want to Delete? : ";
        cin>>word;

        /* Comparing the string with the given word */

        for (i=0; i<k+1; i++)
        {
                if (strcmp(str1[i], word) == 0)
                {
                        for (j=i; j<k+1; j++)
                        {
                                strcpy(str1[j], str1[j + 1]);
                                k--;
                        }
                }

        }
        cout<<"\n New String After Deleting the Word : \n\n";
        for (i=0; i<k+1; i++)
        {
                cout<<" ";
                cout<<str1[i]<<" ";
        }
        return 0;
}