memset
// CPP program to illustrate memset
//works with var adresses ,basically characters but limit its use to -1 and 0 in int
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
char str[] = "geeksforgeeks";
memset(str, 't', sizeof(str));
cout << str;
return 0;
}
output:
tttttttttttttt