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  1. #include <stdio.h>
  2.  
  3. #define N 3
  4.  
  5. struct student {
  6.     int id, eng, math, sci;
  7. };
  8.  
  9. int main() {
  10.   int i, j, sum1, sum2;
  11.     struct student tmp;
  12.  
  13.     struct student s[N] = {
  14.         {17001, 60, 100, 20},
  15.         {17002, 90, 40, 80},
  16.         {17003, 20, 30, 50}
  17.     };
  18.  
  19.   for(i = 0; i < N - 1; i++) {
  20.     for(j = 0; j < N - 1 - i; j++) {
  21.         sum1 = s[j].eng + s[j].math + s[j].sci;
  22.         sum2 = s[j+1].eng + s[j+1].math + s[j+1].sci;
  23.  
  24.          if(sum1 > sum2) {
  25.              tmp = s[j];
  26.              s[j] = s[j+1];
  27.              s[j+1] = tmp;
  28.         }
  29.      }
  30.   }
  31.  
  32.     for(i = 0; i < N; i++) {
  33.       printf("%d %d %d %d 合計=%d\n",
  34.            s[i].id,
  35.            s[i].eng,
  36.            s[i].math,
  37.            s[i].sci,
  38.            s[i].eng + s[i].math + s[i].sci);
  39.   }
  40.  
  41. return 0;
  42. }
  43.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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17003 20 30 50 合計=100
17001 60 100 20 合計=180
17002 90 40 80 合計=210
https://ideone.com/9VjNLM
language:
C (gcc 8.3)
created:
22 hours ago
visibility:
public

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