char a=0,ch; while((ch=getchar())!='\n') { if(a%2!=0&&(ch>='a'&&ch='a'&&ch

char a=0,ch; while((ch=getchar())!='\n') { if(a%2!=0&&(ch>='a'&&ch='a'&&ch
char a=0,ch; while((ch=getchar())!='\n') { if(a%2!=0&&(ch>='a'&&ch='a'&&ch

char a=0,ch; while((ch=getchar())!='\n') { if(a%2!=0&&(ch>='a'&&ch='a'&&ch
char a=0,ch;
\x09while((ch=getchar())!='\n') //循环,当输入回车的时候会结束循环
\x09{
\x09\x09if(a%2!=0&&(ch>='a'&&ch