简单密码

直接判断的

#include<stdio.h>
#include<string.h>
int main(){
    char str[105],des[105]={0};
    char tmp;
    while(scanf("%s",str)!=EOF){
        for(int i=0;str[i]!=0;i++){
            if(str[i]>='A'&&str[i]<='Z'){
                tmp='a'+str[i]-'A'+1;
                if(tmp>='a'&&tmp<='z'){
                    des[i]=tmp;
                }else{
                    des[i]='a';
                }
            }else if(str[i]>='0'&&str[i]<='9'){
                des[i]=str[i];
            }else{
                if(str[i]>='a'&&str[i]<='c'){
                    des[i]='2';
                }else if(str[i]>='d'&&str[i]<='f'){
                    des[i]='3';
                }else if(str[i]>='g'&&str[i]<='i'){
                    des[i]='4';
                }else if(str[i]>='j'&&str[i]<='l'){
                    des[i]='5';
                }else if(str[i]>='m'&&str[i]<='o'){
                    des[i]='6';
                }else if(str[i]>='p'&&str[i]<='s'){
                    des[i]='7';
                }else if(str[i]>='t'&&str[i]<='v'){
                    des[i]='8';
                }else if(str[i]>='w'&&str[i]<='z'){
                    des[i]='9';
                }
            }
        }
        printf("%s\n",des);
    }
    return 0;
}