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  1. #include <stdio.h>
  2.  
  3. // 1からnまでの和を求める関数
  4. int sum(int n){
  5.     int s = 0;
  6.     for(int i = 1; i <= n; i++){
  7.         s += i;
  8.     }
  9.     return s;
  10. }
  11. int main(void) {
  12.     int a, b;
  13.     a = 10;
  14.     b = sum(a);  
  15.     printf("1から%dまでの和は%dです\n", a, b);
  16.     return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5320KB
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Standard input is empty
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1から10までの和は55です
https://ideone.com/o8UMY9
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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