sequential search occurence

[Hey11]

hello
i wanted to ask how to create a function that makes the insertion code search for an occurence that i will insert with a cin , instead of picking the first occurence
for example the array is arr[]={1,2,3,5,3,1,3}
there are 3 threes here , i want to get the index for the one i want using a cin , plz help me

[Fbody]

So do you want to put in, for example, "3 2" and have it find the second occurrence of the value "3"?

[Hey11]

yeah

[myk45]

@OP

How about this:

cin >> num;
cin >> occuranceValue;

for (int index = 0, count = 0; count < occuranceValue; index++) {
        if (arr[index] == num)
            count++;
}

return index; // shows the index in the array where the nth occurance of num is present.

[Hey11]

it is gives me always a zero

#include<iostream>

using namespace std;

int last(int arr[] , int ssize , int key ,int val)
{
int i ;
for ( i=0 ; i<=ssize ;i++ )
{ 
for (int count =0 ;count<val ;count ++)
{if (arr[i] == key)            
count++;
}

return i ; 
} 
return -1 ;
}

int main()
{
	
	int arr[]={1,2,4,76,4,7,2,1,7,9};
	int val;
		int k;
	for(int i=0;i<10;i++)
	{cout<<arr[i]<<endl;
}
cout<<"enter key"<<endl;
cin>>k;
cout<<"enter val"<<endl;
cin>>val;
	int ret=last(arr,10,k,val);
		if (ret==-1)
			cout<<"not found"<<endl;
		else cout<<ret<<endl;
system("pause");
return 0;
}

plz help , whats wrong in the code ??

[WaltP]

plz help , whats wrong in the code ??

Here's what I see wrong:
1) Bad formatting, making the code hard to follow (see this)
2) Using system("pause"); (see this)
3) Incrementing the FOR loop counter within the FOR loop.

The first two are not quite what you were looking for, but they are what you asked for.

[Hey11]

using the system pause is necessary for me because i use the dev c++
and where shall i increment the for loop counter ??

[Hey11]

now i modified it but it still views the first occurence

#include<iostream>

using namespace std;

int last(int arr[] , int ssize , int key ,int val)
{
int i ;
 for (int i = 0, count = 0; count< val; i++) {

{if (arr[i] == key)            



return i ; 
} 
}
return -1 ;
}

int main()
{
	
	int arr[]={1,2,4,76,4,7,2,1,7,4};
	int val;
		int k;
	for(int i=0;i<10;i++)
	{cout<<arr[i]<<endl;
}
cout<<"enter key"<<endl;
cin>>k;
cout<<"enter val"<<endl;
cin>>val;
	int ret=last(arr,10,k,val);
		if (ret==-1)
			cout<<"not found"<<endl;
		else cout<<ret<<endl;
system("pause");
return 0;
}

[WaltP]

You obviously didn't bother to read the links I posted. I tried to help....

[myk45]

@OP

int last(int arr[] , int ssize , int key ,int val)
{

 int ans = -1;

 for (int i = 0, count = 0; count < val; i++) {
	if (i == ssize)
		break;

	if (arr[i] == key) {
		count++;
		ans = i;		
	}
	
 }    
	       
 return ans;
}

You were returning on the first occurance.