C Exercises: Print out the difference of the maximum and minimum values of these four numbers

C Basic Declarations and Expressions: Exercise-58 with Solution

Write a C program that accepts 4 real numbers from the keyboard and print out the difference of the maximum and minimum values of these four numbers.

Note: Use 4-decimal places.
Test data and expected output:
Input: 1.54 1.236 1.3625 1.002
Output: Difference is 0.5380

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
  int main() {
    double a1, a2, a3, a4;
    double max, min;
    printf("Input four numbers: \n");
    scanf("%lf%lf%lf%lf", & a1, & a2, & a3, & a4);
    if (a1 >= a2 && a1 >= a3 && a1 >= a4)
      max = a1;
    else if (a2 >= a1 && a2 >= a3 && a2 >= a4)
      max = a2;
    else if (a3 >= a1 && a3 >= a2 && a3 >= a4)
      max = a3;
    else
      max = a4;
    if (a1 <= a2 && a1 <= a3 && a1 <= a4)
      min = a1;
    else if (a2 <= a1 && a2 <= a3 && a2 <= a4)
      min = a2;
    else if (a3 <= a1 && a3 <= a2 && a3 <= a4)
      min = a3;
    else
      min = a4;
    printf("Difference is %0.4lf\n", max - min);
    return 0;
  }

Sample Output:

Input four numbers: 1.54 1.236 1.3625 1.002 
Difference is 0.5380

Flowchart:

C programming Code Editor:

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