练习30

#include <iostream>
#include <cstdio>
using namespace std;


int count(char *str)
{
int i,num=0;
for (i=0; str[i]; i++)
{
if ( (str[i]>='a' && str[i]<='z') || (str[i]>='A' && str[i]<='Z') )
num++;
}
return num;
}


int main()
{
char text[100];
cout << "输入一个英语句子：" << endl;
gets(text);
cout << "这个句子里有" << count(text) << "个字母。" << endl;
}