fork download
copy 
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct
  5. {
  6.     int age;
  7.     float weight;
  8. } person;
  9.  
  10. /*
  11. Recursive function that:
  12. 1. Inputs data
  13. 2. Updates running totals
  14.  
  15. So we only traverse the array ONE time.
  16. */
  17. void process_people(person *p[], int i, int n, int *sum_age, float *sum_weight)
  18. {
  19.     // Base case: all people processed
  20.     if (i == n)
  21.         return;
  22.  
  23.     // Allocate memory for this person
  24.     p[i] = (person*)malloc(sizeof(person));
  25.  
  26.     printf("Enter age of person %d: ", i + 1);
  27.     scanf("%d", &p[i]->age);
  28.  
  29.     printf("Enter weight of person %d: ", i + 1);
  30.     scanf("%f", &p[i]->weight);
  31.  
  32.     // Update running totals
  33.     *sum_age += p[i]->age;
  34.     *sum_weight += p[i]->weight;
  35.  
  36.     // Recursive call for next person
  37.     process_people(p, i + 1, n, sum_age, sum_weight);
  38. }
  39.  
  40. /*
  41. Recursive function to free allocated memory
  42. */
  43. void free_people(person *p[], int i, int n)
  44. {
  45.     if (i == n)
  46.         return;
  47.  
  48.     free(p[i]);
  49.  
  50.     free_people(p, i + 1, n);
  51. }
  52.  
  53. int main()
  54. {
  55.     int n;
  56.  
  57.     printf("Enter the number of people: ");
  58.     scanf("%d", &n);
  59.  
  60.     person *p[n];
  61.  
  62.     int sum_age = 0;
  63.     float sum_weight = 0;
  64.  
  65.     // One recursion handles both input and sum
  66.     process_people(p, 0, n, &sum_age, &sum_weight);
  67.  
  68.     printf("\n------ Results ------\n");
  69.     printf("Total Age = %d\n", sum_age);
  70.     printf("Total Weight = %.2f\n", sum_weight);
  71.  
  72.     printf("Average Age = %.2f\n", (float)sum_age / n);
  73.     printf("Average Weight = %.2f\n", sum_weight / n);
  74.  
  75.     // Free allocated memory
  76.     free_people(p, 0, n);
  77.  
  78.     return 0;
  79. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Enter the number of people: 
------ Results ------
Total Age = 0
Total Weight = 0.00
Average Age = -nan
Average Weight = -nan
https://ideone.com/Dxu9fT
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!