没初始化，就会......

稻花香里说丰年，听取————

WA声一片！！

#include<bits/stdc++.h>
using namespace std;
int main(){
string a;
int b;
getline(cin,a);
for(int i=0;i<=a.size();i++){
if(a[i]=='a'||a[i]=='d'||a[i]=='g'||a[i]=='j'||a[i]=='m'||a[i]=='p'||a[i]=='t'||a[i]=='w'||a[i]==' ')b++;
else if(a[i]=='b'||a[i]=='e'||a[i]=='h'||a[i]=='k'||a[i]=='n'||a[i]=='q'||a[i]=='u'||a[i]=='x')b+=2;
else if(a[i]=='c'||a[i]=='f'||a[i]=='i'||a[i]=='l'||a[i]=='o'||a[i]=='r'||a[i]=='v'||a[i]=='y')b+=3;
else if(a[i]=='s'||a[i]=='z')b+=4;
}
cout<<b<<endl;
return 0;
} 

琢磨了半个小时啊啊啊啊啊--------