fork download
copy 
  1. #include <stdio.h>
  2.  
  3. #define MAX 100  
  4. int seiseki[MAX];  
  5. int size = 0;  
  6.  
  7. void record(int score) {
  8.     if (size < MAX) {
  9.         seiseki[size] = score;  
  10.         size++;  
  11.     } else {
  12.         printf("入力上限に達しました。\n");
  13.     }
  14. }
  15.  
  16. double average() {
  17.     if (size == 0) return 0;  
  18.  
  19.     int sum = 0;
  20.     for (int i = 0; i < size; i++) {
  21.         sum += seiseki[i];  
  22.     }
  23.     return (double)sum / size;  
  24. }
  25.  
  26. double cond_average(int a, int b) {
  27.     int sum = 0, count = 0;
  28.     for (int i = 0; i < size; i++) {
  29.         if (seiseki[i] >= a && seiseki[i] <= b) { 
  30.             sum += seiseki[i];
  31.             count++;
  32.         }
  33.     }
  34.  
  35.     if (count > 0) {
  36.         return (double)sum / count;  
  37.     } else {
  38.         return 0; 
  39.     }
  40. }
  41.  
  42. int main() {
  43.     int num;
  44.     printf("学生の人数を入力してください:\n");
  45.     scanf("%d", &num);
  46.  
  47.     for (int i = 0; i < num; i++) {
  48.         int score;
  49.         printf("学生 %d の点数を入力\n", i + 1);
  50.         scanf("%d", &score);
  51.         record(score);  
  52.     }
  53.  
  54.     printf("全体の平均点: %d\n", average());
  55.     printf("60点以上100点以下の平均点: %d\n", cond_average(60, 100));
  56.  
  57.     return 0;
  58. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
copy 
3 61 62 63
stdout
copy 
学生の人数を入力してください:
学生 1 の点数を入力
学生 2 の点数を入力
学生 3 の点数を入力
全体の平均点: 186
60点以上100点以下の平均点: 63
https://ideone.com/vDVr4k
language:
C (gcc 8.3)
created:
9 days 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!