}
}
return count;
}
int main()
{
string sentence;
cout<<"请输入一条英文语句：";
getline(cin,sentence);
int letter_count = count_letters(sentence);
cout<<"这条英文中字母的个数为："<<letter_count<<endl;
return 0;
}
6-22
void reverse(string &s)
{
int left = 0,right = s.length() - 1;
while(left<right)
{
swap(s[left],s[right]);
left++;
right--;
}
}
6-23
#include<iostream>
#define N 8
using namespace std;
int main()
{
int a[N];
int b=0;
cout<<"请输入N个人的考试成绩"<<endl;
for(int i=0;i<N;i++)
{
cin>>a[i];
b+=a[i];
}
double c=b/8.000;
cout<<"这些同学的平均成绩为："<<c<<endl;
return 0;
}