int rabbitsNumber=0;
int chickensNumber=0;
for(chickensNumber=0;chickensNumber<=9;chickensNumber++) { //遍歷雞的只數
rabbitsNumber=9-chickensNumber; //兔的只數等於9 - 雞
if(2*chickensNumber+4*rabbitsNumber==26) //雞和兔的腳總數是26
System.out.println("雞"+chickensNumber+"只,兔"+rabbitsNumber+"只");
}
}