Find largest digit in c program

mumbers (positive,nagative,integer,double numbers) from the keyboard and prints area,largest number,negcount,reverse,average.*/

//including header file

#include

using namespace std;

// main declaration

void main()

{

//declaring variables

int num;

int sum1=0;

float sum2=0;

int negcount=0;

int i=0;

int largest;

int smallest;

float average=0.0;

int temp1=0;

int temp2=0;

float area=0.0;

int radius;

int large;

int small;

int temp3;

int b;

int temp4;

int temp;

int poscount=0;

float pi=3.14;

for(i=0; i<8; i++)

{

//Reading numbers from user

cout << "Enter integer number " << i+1 << ", followed by 'Enter': ", i;

cin >> num;

if(i==0)

{

largest=num;

smallest=num;

temp=num;

}

if(i==1)

temp3=num;

if( num > 0 )//Considering positive numbers

{

if(poscount==0)

{

large=num;

small=num;

}

sum1= sum1+num;

poscount++;

}

else

{

// considering negative numbers

if(negcount==0)

temp1=num;

if(negcount==1)

temp2=num;

if(temp2<0)

sum2=temp1+temp2;

average = sum2/2;

negcount++;

}

// checking the largest number of given 8 numbers

if ( num < smallest )

{

smallest = num;

}

if ( num > largest )

{

largest = num;

}

//checking the smallest positive number

if(num>0)

{

if ( num <= small )

{

Find largest digit in c program small = num;

}

if ( num >= large )

{

large = num;

}

radius=small;

area=pi*(radius*radius);//calculating the area of the circle

}

// reversing the first two numbers entred

b=temp-((temp/10)*10);

temp4=b;

}

//printing outputs for given inputs

cout<cout << "Sum of positive numbers entered is " << sum1 << endl;

cout << "count of negative numbers entered is " << negcount << endl;

cout << "Largest number of all entered inputs is " << largest<cout<<"reverse of first two numbers is"<cout<< temp4<cout<<"average of first two negative numbers given is"<cout<<"area of circle using small positive number as radius"<}