In this tutorial, we will discuss the concept of Cpp program: find the greatest of three numbers using the function
In this post, we will learn how to find the greatest number among three numbers using a user-defined function in C++ programming language
In my previous post, I have explained the various approaches to find the largest number among three numbers in C++ language
However, in this program, we embed the logic of the program in the user defined-function.
Here, I have explained how to find the greatest number from the given three numbers and how to embed this logic in the function in C++.
Program 1
This program allows the user to enter three numbers and compare to select the largest number using nested if statements
#include <iostream>
#include <conio.h>
using namespace std;
int findBiggest(int,int,int);//function prototype
int main()
{
double num1, num2,num3; //declare the variables
cout<<"Enter the first number to compare: ";
cin>>num1;//get input from user for num1
cout<<"Enter the second number to compare: ";
cin>>num2;//get input from user for num2
cout<<"Enter the third number to compare: ";
cin>>num3;//get input from user for num3
int result=findBiggest(num1,num2,num3);//function call
cout<<"Biggest number is: "<<result;//display the output
getch();
return 0;
}
int findBiggest(int num1, int num2, int num3){//function definition
int biggest;
if(num1>=num2){
if(num1>=num3){
return num1;
}
else{
return num3;
}
}
else{
if(num2>num3){
return num2;
}
else{
return num3;
}
}
}
When the above code is executed, it produces the following results
Enter the first number to compare: 87 Enter the second number to compare: 23 Enter the third number to compare: 67 Biggest number is: 87
Program 2
This program allows the user to enter three numbers and compare to select the largest number using if-else-if statements
#include <iostream>
#include <conio.h>
using namespace std;
int findBiggest(int,int,int);
int main()
{
double num1, num2,num3; //declare the variables
cout<<"Enter the first number to compare: ";
cin>>num1;//get input from user for num1
cout<<"Enter the second number to compare: ";
cin>>num2;//get input from user for num2
cout<<"Enter the third number to compare: ";
cin>>num3;//get input from user for num3
int result=findBiggest(num1,num2,num3);//function call
cout<<"Biggest number is: "<<result;//Display the output
getch();
return 0;
}
int findBiggest(int num1, int num2, int num3){//function definition
int biggest;
if(num1>=num2 && num1>=num3){
biggest=num1;
}//num1 compare num 2 and num 3
else if(num2>=num1 && num2>=num3){
biggest=num2;
}//num2 compare num1 and num3
else{biggest=num3;
}
return biggest;
}
When the above code is executed, it produces the following results
Enter the first number to compare: 35 Enter the second number to compare: 89 Enter the third number to compare: 54 Biggest number is: 89
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View Comments
Clear and simple:
cin >> nNumberOne;
cin >> nNumberTwo;
cin >> nNumberThree;
nLargestNumber = nNumberOne;
if (nLargestNumber < nNumberTwo)
{
nLargestNumber = nNumberTwo;
}
if (nLargestNumber < nNumberThree)
{
nLargestNumber = nNumberThree;
}
cout << nLargestNumber << endl;