Q:
A:
百元買百雞: 100錢最多買20只公雞,最多買33只公雞,最多買99只雞(也不會買99只,買了以後就不夠100錢了…),所以循環3次,其次c++整數相除,chick取得是整數,chick也是3只雞1錢,chick也必須被3整除
#include<iostream>
using namespace std;
int main() {
//hundred yuan to by 100 chiken
int cock, hen, chick;
//cock less than 20,hen less than 33,chick less than 100
for (int cock = 0; cock <= 20; cock++) {
for (int hen = 0; hen <= 33; hen++) {
for (int chick = 0; chick <= 99; chick++) {
//chick num is zero
if (chick == 0) {
if ((cock * 5 + hen * 3) == 100 && (cock + hen) == 100)
cout << "cock:" << cock << " hen:" << hen << " chick:" << chick << endl;
//chick is divided by 3
} else if (chick % 3 == 0) {
if ((cock * 5 + hen * 3 + chick / 3) == 100 && (cock + hen + chick) == 100)
cout << "cock:" << cock << " hen:" << hen << " chick:" << chick << endl;
}
}
}
}
return 0;
}