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  1. #include <stdio.h>
  2. int sum(int n){
  3. return(n*n+n)/2;
  4. }
  5.  
  6. int main(void) {
  7. 	int a,b;
  8.     a = 10;
  9.     b = sum(a);
  10.     printf("1から%dまでの和は%d", a,b );
  11. 	return 0;
  12. }
  13.  
Success #stdin #stdout 0.01s 5272KB
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Standard input is empty
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1から10までの和は55
https://ideone.com/e7YkIk
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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