#include
int main() {
int n, arr;
int sum = 0;
scanf_s("%d\n", &n);
for (int i = 1; i <= n; i++) {
scanf_s("%d\n", &arr);
sum = sum + arr;
}
printf("和为：%d\n", sum);
printf("平均数为：%.5lf\n", sum*1.0/n);
return 0;
}
输入值呢 scanf_s里的\n都去掉
#include<stdio.h>
int main() {
int n, arr;
int sum = 0;
scanf_s("%d", &n);
for (int i = 1; i <= n; i++) {
scanf_s("%d", &arr);
sum = sum + arr;
}
printf("和为：%d\n", sum);
printf("平均数为：%.5lf\n", sum*1.0/n);
return 0;
}