第一个里面if(xx[i][j]>='a' && xx[i][j]<'z') xx[i][j]+=1; if(xx[i][j]=='z') xx[i][j]='a';如果是'y'的话就变成'a'了，可以改成if(xx[i][j]>='a' && xx[i][j]<'z') xx[i][j]+=1; else if(xx[i][j]=='z') xx[i][j]='a';
