HackerRank Functions in C problem solution

In this tutorial, we are going to solve HackerRank functions in C problem solution or write a program to solve this challenge. we need to write a function that can take four values and return the greatest of them.

Using this problem we are going to learn about functions in c programming. just for a note the input values will always be nonnegative.

HackerRank Functions in C problem solution.

#include <stdio.h>
/*
Add `int max_of_four(int a, int b, int c, int d)` here.
*/
int max_of_four(int a, int b, int c, int d) {
 int max = 0;
    
 if(max <= a) max = a;
 if(max <= b) max = b;
 if(max <= c) max = c;
 if(max <= d) max = d;
 return max;   
}

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;
}

Explanation

In this program, we have first defined the main() function. inside the main function first we have defined four integer variables a, b, c, d. After that, we read the values from the input screen given by the user using the scanf() function.

After that, we called the internally defined function max_of_fours() and passed all four values.

What is inside the max_of_fours() function?

Inside the max_of_fours function first, we have defined a max variable that initially holds the 0 as a value. after that using the if condition we checked if the value of variable a was greater than max variable value. if the condition is true then we assign the value of a to max variable. similarly, we used the same condition to check the value of variable b, c, and d and assign it to the variable max.

after that, we returned the value of max from the function and stored it in the ans variable. and using the printf() function we have printed the value of ans variable on the output screen.

Do you know what is return 0; means?

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