c语言题目~考试中在线等

Question

编写一个数组a[9],内容为“86，92，98，96，59，84，32，69，58”，求其平均数，并输出平均数和这个数组，保留两位小数。
结果如：74.55
86 92 98 96 59 84 32 69 58

Answer 1

#include "stdio.h"
void main(){
double a[9]={86, 92, 98 ,96, 59, 84 ,32 ,69 ,58};
int i=0;
double mean;
double count=0;
for(i=0;i<9;i++){
count+=a[i];
printf("%2f,",a[i]);
}
mean=count/9;
printf("\n");
printf("%2f",mean);
}

Answer 2

#include <stdio.h>
mian()
{
int a[9]={86，92，98，96，59，84，32，69，58};
int i;
float s-0.0;
for (i=0;i<9;i++)
s=s+(float)a[i];
s=s/9.0;
for (i=0;i<9;i++)
printf("%3d",a[i]);
printf("\n");
printf("%.2f",s);
}

Answer 3

下次自己写啊:
float a[]={86，92，98，96，59，84，32，69，58};
float sum=0;
for(int i=0;i<9;i++)
sum+=a[i];
printf("%4.2f",sum/9);
for(int j=0;j<9;j++)
printf("%4.2f",a[i]);

Answer 4

#include "stdio.h"
main()
{
int a[9]={86,92,98,96,59,84,32,69,58};
int i;
float ave,sum=0;
for(i=0;i<9;i++)
printf("%d\n",a[i]);
for(i=0;i<9;i++)
sum=sum+a[i];
ave=sum/9;
printf("%5.2f\n",ave);
}

Answer 5

这里定义整型数组存储数组，后面求平均数用到实型定义即可．代码如下：
#include<stdio.h>
int main()
{
int a[9={86,92,98,96,59,84,32,69,58};
foalt m;
for(i=0;i<9;i++)
m+=a[i];
m/=9;
printf("%5.2f\n",m);
for(i=0;i<9;i++)
printf("%d ",a[i]);
}

Answer 6

#include<stdio.h>
void main()
{
int a[9]={86,92,98,96,59,84,32,69,58};
int i;
float s=0.0;
for (i=0;i<9;i++)
s=s+(float)a[i];
s=s/9.0;
for (i=0;i<9;i++)
printf("%3d",a[i]);
printf("\n");
printf("%.2f\n",s);
}