PAT 乙级 1029

把小写改成大写就好办多了

#include<iostream>using namespace std;int main(){string s1,s2;cin>>s1>>s2;char c[200];int flag;int k=0;for(int i=0;i<s1.length();i++){flag=0;if(s1[i]>='a'&&s1[i]<='z')  s1[i]=s1[i]-32;for(int j=0;j<s2.length();j++){if(s2[i]>='a'&&s2[i]<='z')  s2[i]=s2[i]-32;if(s2[j]==s1[i]){//cout<<s2[j]<<endl;break;}else{    flag++;}}int flag1=0;if(flag==s2.length()){for(int z=0;z<k;z++){if(c[z]==s1[i]){flag1=1;break;} }if(flag1==0){   c[k++]=s1[i];} }}for(int i=0;i<k;i++)    {  cout<<c[i];  }return 0; }