#include <iostream>
 
using namespace std;
 
#include <time.h>
#include<stdlib.h>
 
#include <math.h>
int main() 
 
{
 
int a[30];
 
int x;
 
int z=0;
 
srand((unsigned)time(NULL));
 
cout<<"原数组：";
 
for(int i=0;i<30;i++)
 
{
 
a[i]=rand()%21;
 
cout<<a[i]<<" ";
 
}
 
cout<<endl;
 
cout<<"输入m值<0~20>：";
 
cin>>x;
 
cout<<x<<endl;
 
if(x<0||x>20)
 
cout<<"输入数据越界！"<<endl;
 
else
{
for(int i=0;i<30;i++)
{
if(a[i]=x)
z=z+1;
}
 
cout<<x<<"在数组中，出现了"<<z<<"次";
}
return 0;
 
}

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