Copy the string using strcpy function

 #include<iostream>

#include<string.h>

using namespace std;

int main()

{

char input_str[10];

char output_str[10];

cout<<"enetr the strings:"<<endl;

cin.getline(input_str,10);

cout<<"Input_str:"<<input_str<<endl;

strcpy(output_str,input_str);

cout<<"output str="<<output_str<<endl;

strcpy(output_str,"didn't know");

cout<<"output_str::::"<<output_str<<endl;

return 0;

}