UC知道c++小题错误分析
来源：百度知道 编辑：UC知道 时间：2024/06/24 15:00:37
马克思的手稿中有一道趣味数学问题：有30个人，其中有男人、女人和小孩，在一家饭馆吃饭花了50先令，每个男人花3先令，每个女人花2先令，每个小孩花1先令，问男人、女人和小孩各有几人？
#include<iostream>
using namespace std;
int main()
{
int man, woman,child;
for(man=1;man<=30;man++)
for(woman=1;woman<=30;woman++)
{
for(child=30-man-woman;child<=30;child++)
if(child+man*3+woman*2==50&&child>=1)
cout<<"man="<<man<<" "<<"woman="<<woman<<" "<<"child="<<child<<endl;
}
return 0;
}
请详细解释错误的原因
#include<iostream>
using namespace std;
int main()
{
int man, woman,child;
for(man=1;man<=30;man++)
for(woman=1;woman<=30;woman++)
{
for(child=30-man-woman;child<=30;child++)
if(child+man*3+woman*2==50&&child>=1)
cout<<"man="<<man<<" "<<"woman="<<woman<<" "<<"child="<<child<<endl;
}
return 0;
}
请详细解释错误的原因
int main()
{
int man, woman, child;
for (man = 1; man <= 30; man++)
for (woman = 1; woman <= 30 - man; woman++)
{
child = 30 - man - woman;
if (child + man * 3 + woman * 2 == 50 && child >= 1)
printf("man=%d, woman=%d, child=%d\n", man, woman, child);
}
return 0;
}
错误很明显了
#include<iostream>
using namespace std;
int main()
{
int man, woman,child;
for(man=1;man<=30;man++)
for(woman=1;woman<=30;woman++)
{
for(child=1;child<=30;child++)
if(child+man*3+woman*2==50&&child>=1&&child+man+woman==30)
cout<<"man="<<man<<" "<<"woman="<<woman<<" "<<"child="<<child<<endl;
}
return 0;
}
for(child=30-man-woman;child<=30;child++)
你在开玩笑吧？如果child=30-man-woman那么一开始小孩的