C++ program (with makefile) that writes to standart output product of 2 numbers from user input and then itself

Makefile

all:
	g++ main.cpp -o productWithItself

mian.cpp

#include <stdio.h>
char *program = (char *)"#include <stdio.h>%cchar *program = (char *)%c%s%c;%cmain() {%c  int a, b;%c  printf(%cEnter number a: %c);%c  scanf(%c%%d%c, &a);%c  printf(%cEnter number b: %c);%c  scanf(%c%%d%c, &b);%c  printf(%cProduct of a & b = %%d%cn%c, a*b);%c  printf(program, 10, 34, program, 34, 10, 10, 10, 34, 34, 10, 34, 34, 10, 34, 34, 10, 34, 34, 10, 34, 92, 34, 10, 10, 10);%c}%c";
main() {
  int a, b;
  printf("Enter number a: ");
  scanf("%d", &a);
  printf("Enter number b: ");
  scanf("%d", &b);
  printf("Product of a & b = %d\n", a*b);
  printf(program, 10, 34, program, 34, 10, 10, 10, 34, 34, 10, 34, 34, 10, 34, 34, 10, 34, 34, 10, 34, 92, 34, 10, 10, 10);
}