题解 | #总成绩和平均分计算#

#include <stdio.h>

int main()
{
    double score1, score2, score3;
    scanf("%lf %lf %lf", &score1, &score2, &score3);
    
    printf("%.2lf %.2lf", score1 + score2 + score3, (score1 + score2 + score3) / 3);
    return  0;
}