#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 x=0;
for(n=10;n>0;n--){
x=x+n;
}
return x;
}
int main(void) {
int a,b;
a = 10;
b = sum(a);
return 0;
}
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