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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     int a[]={3,5,2,4,1,9,7,6,0,8};
  5.     int i;
  6.     int max=a[0],max_index=0;
  7.     int second=-1,second_index=-1;
  8.     double sum=0.0;
  9.  
  10.     for(i=0;i<10;i++) {
  11.         if(a[i]>max) {
  12.             max=a[i];
  13.             max_index=i;
  14.         }
  15.     }
  16.  
  17.  
  18.  
  19.     for(i=0;i<10;i++) {
  20.         if(a[i]!=max&&a[i]>second) {
  21.             second=a[i];
  22.             second_index=i;
  23.         }
  24.     }
  25.  
  26.     for(i=0;i<10;i++) {
  27.         sum+=a[i];
  28.     }
  29.     double average=sum/10.0;
  30.  
  31.     printf("最大値: %d（場所 %d）\n",max,max_index);
  32.     printf("2番目に大きい値: %d（場所%d）\n",second,second_index);
  33.     printf("平均値: %.2f\n",average);
  34.  
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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最大値: 9（場所 5）
2番目に大きい値: 8（場所9）
平均値: 4.50
https://ideone.com/jvd12q
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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