pat乙级 1033 旧键盘打字问题

为什么测试点2，3，4一直过不了？

#include <stdio.h>
#include <string.h>
int main() {
    int count = 0;
    int hash[255] = {0};
    char brokey[50];
    gets(brokey);
    int len = strlen(brokey);
    char putstr[100];
    gets(putstr);
    int len1 = strlen(putstr);
    if(len1!=0){
        for (int i = 0; i < len; i++) {
            hash[brokey[i] - '0'] = 1;
            if(brokey[i]=='+'){        //如果是'+'，所有大写字母标为1
                for(int i='A'-'0';i<='Z'-'0';i++){
                    hash[i] = 1;
                }
            }
        if(brokey[i]>='A'&&brokey[i]<='Z')
            hash[(brokey[i]+32)-'0'] = 1;         //标记对应小写字母
        }
        for(int i = 0;i<len1;i++){
            if(hash[putstr[i]-'0']==0){
                printf("%c",putstr[i]);
                count = 1;
            }
        }
    }
    if(count==0)
    printf("\n");
    return 0;
}