View Code of Problem 72

#include <stdio.h>
int main(){
	int N;
	double M;
	scanf("%lf %d",&M,&N);
	double temp=M;
	for(int i=1;i<N;i++)
	{
		M=M/2;
		sum+=2*M;
	}
	sum +=temp;
	printf("%0.2lf %0.2lf",M/2,sum);
	return 0;
}
/*
Main.c: In function 'main':
Main.c:10:3: error: 'sum' undeclared (first use in this function)
   sum+=2*M;
   ^
Main.c:10:3: note: each undeclared identifier is reported only once for each function it appears in
*/