MemCpySetChar, C++ (gcc)

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//g++  7.4.0

////////////////////////////////////////////////////////////////////////////////MemCpySetChar
// prototypes: void* memset (void* std,int val,size_t n);
//void* memcpy(void* to,const void* from,size_t n);
//void* memchr(void *str,int val,size_t n);
//this code is created by Rezaul Hoque on July 11,2022;
//contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;
/////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <string.h>

int main()
{
    char a[]="Hurray! Hurray! It's a holy, holiday.";
char *r;
char c[70];
 r=(char*)memchr(a,'y',strlen(a));

if(r!=NULL)
  std::cout<<"1st occurrence of \'y\' is at "<<r-a+1;
else
  std::cout<<"\'y\' is not found.\n";
memcpy(c,a,strlen(a)+1);
std::cout<<"\nCopied string using memcpy():\n"<<c;
memset(a,'*',7);
std::cout<<"\nInitial string after memset():\n"<<a;

return 0;
}

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Compilation time: 0.62 sec, absolute running time: 0.17 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,9 sec