Openjudge1.5答案（前十题）

目录

01

02

03

04

05

06

07

08

09

10

---

01

#include <stdio.h>
#include<math.h>
int main()
{
	int n;
	scanf("%d",&n);
	int i;
	double average=0;
	for(i=0;i<n;i++)
	{
		int goal;
		scanf("%d",&goal);
		average+=goal;
	} 
	average/=n;
	printf("%.2f",average);
}

02

#include <stdio.h>
#include<math.h>
int main()
{
	double salary;
	double ave=0;
	int i;
	for(i=0;i<12;i++)
	{
		scanf("%lf",&salary);
		ave+=salary;
	}
	ave/=12;
	printf("$%.2f",ave);
}

03

#include <stdio.h>
#include<math.h>
int main()
{
	int n;
	scanf("%d",&n);
	int i;
	double x,ave;
	for(i=0;i<n;i++)
	{
		scanf("%lf",&x);
		ave+=x;
	}
	ave/=n;
	printf("%.4f",ave);
}

04

#include <stdio.h>
#include<math.h>
int main()
{
	int