从输入任意个整型数，统计其中的负数个数并求所有非负数的平均值
记负均正II
http://www.nowcoder.com/questionTerminal/64f6f222499c4c94b338e588592b6a62
#include "stdio.h"
#include "string.h"
int main(void)
{
int num;
int count1 = 0,count2 = 0;
double numCount = 0;
double a;
while(scanf("%d", &num) != EOF)
{
if(num < 0)
count1++;
else
{
count2++;
numCount+=num;
a = numCount / count2;
}
}
printf("%d\r\n",count1);
printf("%0.1f\r\n",a);
return 0;
} 
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