Thursday, April 3, 2014
Wednesday, April 2, 2014
How to find second greatest number in an array? C++ Program
Source Code:
//second greates among array
#include<iostream>
using namespace std;
int great (int a[],int n)
{
int i,greatest;
greatest=a[0];
for (i=0;i<n;i++)
{
if(a[i]>greatest)
greatest=a[i];
}
return greatest;
}
int second (int a[],int n)
{
int i,second,g;
g=great(a,n);
if(a[0]==g)
second=a[1];
else
second=a[0];
for(i=0;i<n;i++)
{
if(a[i]>second&&a[i]<g)
{
second=a[i];
}
}
return second;
}
int main()
{
int n,a[40],j;
cout<<"How many numbers? ";
cin>>n;
cout<<"Enter "<<n<<" numbers\n";
for(j=0;j<n;j++)
cin>>a[j];
cout<<"The greatest number is "<<great(a,n)<<endl;
cout<<"The second greatest number is "<<second(a,n)<<endl;
system("pause");
return 0;
}
Output:
Insertion Sort in C++
Source Code:
//insertion sort#include<iostream>
#include<stdlib.h>
using namespace std;
class insertion
{
private:
int n,key;
int stack[100],temp;
public:
void getinput()
{
cout<<"How many nuumbers in array? ";
cin>>n;
cout<<"Enter "<<n<<" numbers: ";
for (int i=0;i<n;i++)
cin>>stack[i];
}
void ascending()
{
for (int i=1;i<n;i++)
{
while(i>0 && stack[i]<stack[i-1])
{
temp=stack[i];
stack[i]=stack[i-1];
stack[i-1]=temp;
i--;
}
}
}
void descending()
{
for (int i=1;i<n;i++)
{
while(i>0&&stack[i]>stack[i-1])
{
temp=stack[i];
stack[i]=stack[i-1];
stack[i-1]=temp;
i--;
}
}
}
void showoutput()
{
cout<<"\nThe sorted numbers are: ";
for(int j=0;j<n;j++)
cout<<stack[j]<<"\t";
cout<<"\n----------------------------------------------- --------------\n";
}
};
int main()
{
insertion q;
int choice;
cout<<"\n**************************\n******INSERTION SORT******\n**************************\n";
while (1)
{
cout<<"\n1-> Sort in ascending order\n";
cout<<"2-> Sort in descending order\n";
cout<<"3-> Exit\n";
cout<<"\n\nEnter your choice(1, 2 or 3): ";
cin>>choice;
switch(choice)
{
case(1):
q.getinput();
q.ascending();
q.showoutput();
break;
case(2):
q.getinput();
q.descending();
q.showoutput();
break;
case(3):
exit(1);
}
}
system("pause");
return 0;
}
Output:
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