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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. void init(FILE* f, int** avrs, int*** lines, int n) {
  5.    const int m = 5;
  6.    int i;
  7.    int j;
  8.    int s;
  9.    int* as;
  10.    int** ls;
  11.    int* l;
  12.  
  13.    /* read data */
  14.    ls = malloc(sizeof(int*) * n);
  15.    for (i = 0; i < n; i++) {
  16.       l = malloc(sizeof(int) * m);
  17.       fscanf(f, "%d　%d　%d　%d　%d%*c", &l[0], &l[1], &l[2], &l[3], &l[4]);
  18.       ls[i] = l;
  19.    }
  20.  
  21.    /* compute average */
  22.    as = malloc(sizeof(int) * n);
  23.    for (i = 0; i < n; i++) {
  24.       l = ls[i];
  25.       s = 0;
  26.       for (j = 1; j < m; j++) {
  27.          s += l[j];
  28.       }
  29.       as[i] = s / (m - 1);
  30.    }
  31.  
  32.    *avrs = as;
  33.    *lines = ls;
  34. }
  35.  
  36. void sort(int* avrs, int** lines, int n) {
  37.    int i;
  38.    int j;
  39.    int t1;
  40.    int* t2;
  41.  
  42.    for (i = 0; i < n - 1; i++) {
  43.       for (j = 0; j < n - 1; j++) {
  44.          if (avrs[j] < avrs[j + 1]) {
  45.             t1 = avrs[j];
  46.             avrs[j] = avrs[j + 1];
  47.             avrs[j + 1] = t1;
  48.  
  49.             t2 = lines[j];
  50.             lines[j] = lines[j + 1];
  51.             lines[j + 1] = t2;
  52.          }
  53.       }
  54.    }
  55. }
  56.  
  57. void print(int* avrs, int** lines, int n) {
  58.    int i;
  59.    int* line;
  60.    for (i = 0; i < n; i++) {
  61.       line = lines[i];
  62.       printf("avr:%d　%d　%d　%d　%d　%d\n", avrs[i], line[0], line[1], line[2], line[3], line[4]);
  63.    }
  64. }
  65.  
  66. void term(int* avrs, int** lines, int n) {
  67.    int i;
  68.    free(avrs);
  69.    for (i = 0; i < n; i++) {
  70.       free(lines[i]);
  71.    }
  72.    free(lines);
  73. }
  74.  
  75. int main(void) {
  76.    int n;
  77.    int* avrs;
  78.    int** lines;
  79.    FILE* f;
  80.  
  81.    f = fopen("test.dat", "r");
  82.    fscanf(f, "%d%*c", &n);
  83.    init(f, &avrs, &lines, n);
  84.    fclose(f);
  85.    sort(avrs, lines, n);
  86.    print(avrs, lines, n);
  87.    term(avrs, lines, n);
  88.  
  89.    return EXIT_SUCCESS;
  90. }
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https://ideone.com/Klekic
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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