c++作业5

#include<iostream>
using namespace std;
int main()
{
const int n=10;
int score
,a
,b
,max,min,j=0,k=0;
double aver=0;
cout<<"请输入十名学生的成绩：";
for(int i=0;i<n;i++)
{
cin>>score[i];
if(score[i]<0||score[i]>100)
{
cout<<"成绩输入错误，请重新输入"<<endl;
cin>>score[i];
}
}
max=score[0];
min=score[0];
{
for( i=0;i<n;i++)
{
if(score[i]>max)
max=score[i];
if(score[i]<min)
min=score[i];
aver+=score[i];
}
for( i=0;i<n;i++)
{
if(score[i]==max)
{
a[j++]=i;

}
if(score[i]==min)
{
b[k++]=i;
}
}

aver=aver/n;

cout<<"该小组最高分为："<<max<<endl;
cout<<"该小组最低分为："<<min<<endl;
cout<<"该小组平均分为："<<aver<<endl;
cout<<"最高分的人数为："<<j<<endl;
cout<<"最低分的人数为："<<k<<endl;
cout<<"最高分的学号为：";
for(i=0;i<j;i++)
cout<<a[i]<<"  ";
cout<<endl;
cout<<"最低分的学号为：";
for(i=0;i<k;i++)
cout<<b[i]<<"  ";
cout<<endl;
}
return 0;
}

#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
char str[50];
int i=0,n=0,j=0,k=0,x=0;
cout<<"输入字符串:";
gets(str);
while(str[i]!='\0')
{
if(str[i]>='0'&&str[i]<='9')
{ n++;
i++;}
else if (str[i]>='A'&&str[i]<='Z')
{j++;
i++;}
else if (str[i]>='a'&&str[i]<='z')
{k++;
i++;}
else {x++;
i++;}
}
cout<<"数字个数: "<<n<<endl;

cout<<"大写字母个数: "<<j<<endl;
cout<<"小写字母个数: "<<k<<endl;
cout<<"其它字符个数: "<<x<<endl;
return 0;
}

#include<iostream>
using namespace std;
int main()
{
int a[10],i,sum1=0,sum2=0;
cout<<"请输入十个数：";
for(i=0;i<10;i++)
{
cin>>a[i];
if(a[i]>0)
sum1+=a[i];
if(a[i]<0)
sum2+=a[i];
}

cout<<"正数的和为："<<sum1<<endl;
cout<<"负数的和为："<<sum2<<endl;
return 0;
}