ACM-把字母的电话号码转化成数字的电话号码

每组测试数据只有一行，输入一串字符（字符长度为11）；

3
phqghumeayl
nlfdxfircvs
cxggbwkfnqd

74744863295
65339347287
29442953673

代码：

#include<iostream>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        char str[11];
        int i;
        cin>>str;
        for(i = 0;i < 11;i++)
        {
            if(str[i]==‘a‘||str[i]==‘b‘||str[i]==‘c‘)
                cout<<2;
            if(str[i]==‘d‘||str[i]==‘e‘||str[i]==‘f‘)
                cout<<3;
            if(str[i]==‘g‘||str[i]==‘h‘||str[i]==‘i‘)
                cout<<4;
            if(str[i]==‘j‘||str[i]==‘k‘||str[i]==‘l‘)
                cout<<5;
            if(str[i]==‘m‘||str[i]==‘n‘||str[i]==‘o‘)
                cout<<6;
            if(str[i]==‘p‘||str[i]==‘q‘||str[i]==‘r‘||str[i]==‘s‘)
                cout<<7;
            if(str[i]==‘t‘||str[i]==‘u‘||str[i]==‘v‘)
                cout<<8;
            if(str[i]==‘x‘||str[i]==‘y‘||str[i]==‘z‘||str[i]==‘w‘)
                cout<<9;

            }
            cout<<endl;
    }
    return 0;
}