C++ Examples

C++ Program - Find Largest Number among three Numbers

Three numbers x, y and z are given and the largest number among these three numbers can be found out using below methods:

Method 1: Using If statement

In the example below, only if conditional statements are used.

#include <iostream>
using namespace std;

static void largest(int, int, int);

static void largest(int x, int y, int z) {
  int max = x;
  if (x >= y && x >= z)
    max = x; 
  if (y >= x && y >= z)
    max = y; 
  if (z >= x && z >= y)
    max = z; 
  cout<<"largest number among "<<x<<", "<<
        y<<" and "<<z<<" is: "<<max<<"\n";
}

int main() {
  largest(100, 50, 25);
  largest(50, 50, 25);
  return 0;
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 2: Using If-else statement

It can also be solved using If-else conditional statements.

#include <iostream>
using namespace std;

static void largest(int, int, int);

static void largest(int x, int y, int z) {
  int max = x;
  if (x >= y && x >= z)
    max = x; 
  else if (y >= x && y >= z)
    max = y; 
  else 
    max = z; 
  cout<<"largest number among "<<x<<", "<<
        y<<" and "<<z<<" is: "<<max<<"\n";
}

int main() {
  largest(100, 50, 25);
  largest(50, 50, 25);
  return 0;
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 3: Using Nested If-else statement

The above problem can also be solved using nested if-else conditional statements.

#include <iostream>
using namespace std;

static void largest(int, int, int);

static void largest(int x, int y, int z) {
  int max = x;
  if (x >= y) {
    if(x >= z) 
      max = x;
    else
      max = z;
  }
  else {
    if(y >= z) 
      max = y;
    else
      max = z;
  }
  cout<<"largest number among "<<x<<", "<<
        y<<" and "<<z<<" is: "<<max<<"\n";
}

int main() {
  largest(100, 50, 25);
  largest(50, 50, 25);
  return 0;
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 4: Using ternary operator

The ternary operator can also be used here.

#include <iostream>
using namespace std;

static void largest(int, int, int);

static void largest(int x, int y, int z) {
  int max = x;
  max = (x > y)? ((x > z)? x : z) : ((y > z)? y : z);
  cout<<"largest number among "<<x<<", "<<
        y<<" and "<<z<<" is: "<<max<<"\n";
}

int main() {
  largest(100, 50, 25);
  largest(50, 50, 25);
  return 0;
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

C++ Program - Find Largest Number among three Numbers

Method 1: Using If statement

Method 2: Using If-else statement

Method 3: Using Nested If-else statement

Method 4: Using ternary operator

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