第17周 利用指针得到两个数组中相同的数并输出

#include <iostream>

using namespace std;
int sameNum(int *a,int n1,int *b,int n2, int *c);
int main()
{
int a[50];
int b[50];
int c[50];
int i, n1, n2, n3;
//读入数据
cin>>n1>>n2;
for(i=0;i<n1;i++)
{
cin>>a[i];
}
for(i=0;i<n2;i++)
{
cin>>b[i];
}
n3 = sameNum(a,n1,b,n2,c);
if(n3==0)
cout<<"NULL\n";
else
{
cout<<n3<<endl;
for(i=0; i<n3; i++)
cout<<c[i]<<" ";
cout<<endl;
}
return 0;
}
int sameNum(int *a,int n1,int *b,int n2, int *c)
{
int *p,*q,n=0;
p=a;
q=b;
while(b<q+n2)
{
a=p;
while(a<p+n1)
{
if(*a==*b)
{
*c=*a;
c++;
n++;
}
a++;
}
b++;
}
return n;
}
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<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">运行结果：</span>

<img src="https://img-blog.csdn.net/20141224161635750?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYmFpZHVfMjE2OTg4MTc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />