#include <stdio.h>
//課題B-1: 1からnまでの和を求めるコードを完成させてください
int sum(int n){
}
int main(void) {
int n,sum,i;
n = 11;
sum=0;
for(i=1;i<=n;i++){
sum=sum+i;
}
printf("1から%dまでの和は%d", n
,sum
); return 0;
}
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