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

int main()
{
	char cString[64];

	cout << "Enter a string: ";
	cin.getline(cString, sizeof(cString));

	char cK = ''k'';
	char* pcK = &cK

	while(strchr(cString, ''y''))
	{
		strcpy(strchr(cString, ''y''), pcK);
	}
	
	cout << endl << cString << endl;
	return 0;
}
  

  #include <iostream>#include <string>using namespace std;int main(){  string str;  cout << "Enter a string: ";  getline(cin, str);  int pos = 0;  while(pos != string::npos)  {    pos = str.find_fist_of("k", pos);    str[pos] = ''y'';  }  cout << ''\n'' << str << endl;}  

  #include <stdio.h>#include <string.h>int main(){  char str[256];  ptrinf("Enter a string: ");  scanf("%s", str);  char *pos = &str[0];  while(pos)  {    pos = strchr(pos, ''k'');    *pos = ''y'';  }  printf("%s", str);  return 0;}  

  #include <string>#include <algorithm>using namespace std;char y_to_k( char c ){	if(c == ''y'')		return ''k'';	else		return c;}int main(){	string s = ...;	transform(s.begin(), s.end(), s.begin(), y_to_k);}