Input Format
Input will contain four integers – , one per line.
Output Format
Return the greatest of the four integers.
PS: I/O will be automatically handled.
Sample Input
3
4
6
5
Sample Output
6
#include <iostream>
#include <cstdio>
using namespace std;
int max_of_four(int a,int b,int c,int d){
if( a > b && a > c && a > d){
return a;
}else if(b > a && b > c && b > d){
return b;
}else if( c > a && c > b && c > d){
return c;
}else{
return d;
}
}
int main() {
int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
int ans = max_of_four(a, b, c, d);
printf("%d", ans);
return 0;
}Understanding how the function works in finding the greatest number among four numbers.
The solution of any problem related to coding uses functions in making the code modular and reusable. The explanation designates a C++ program that will find the largest among the four inputs through the use of a custom function called max_of_four. Now, let’s elaborate on the entire program step by step.
#include <iostream>
#include <cstdio>
include : Provides input (cin) and output (cout) functionalities.
include : Used for C-style input/output functions like scanf and printf.
int max_of_four(int a, int b, int c, int d) {
if (a > b && a > c && a > d) {
return a;
} else if (b > a && b > c && b > d) {
return b;
} else if (c > a && c > b && c > d) {
return c;
} else {
return d;
}
}
Purpose: the function will have four integer parameters (a, b, c, d) and will return the greatest number.
Logic:
The numbers compare among themselves using conditional statements (if, else if, and else).
The function returns the biggest number.
int main() {
int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
int ans = max_of_four(a, b, c, d);
printf("%d", ans);
return 0;
}
Input handling
The program inputs four integers using scanf.
Calling the Function:
The inputs are fed to the function max_of_four.
The result, or the largest number, is stored in the variable ans.
Print the Result:
The result is printed by using printf.
How the Program Works
Inputs: The user inputs four integers separated by spaces.
Processing:
The four integers are received by the function max_of_four and determines which of the four integers is greater.
Output: The greatest among the four numbers is displayed on the screen.
Why Use Functions for This Problem?
Modularity: The logic for finding the maximum is encapsulated in the function max_of_four, making the code easier to read and reuse.
Clarity: Separating the logic into a function reduces complexity in the main program.
Reusability: The function can be reused in other programs where finding the maximum is needed.
