csu 1049 第一次串讲——输入输出练习题

# include <stdio.h>
# include <math.h>

int main()
{
int n, j, tmp;
double x, tot;

freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);

while (~scanf("%d%d", &n, &j))
{
tot = 0;
while (n--)
{
scanf("%lf~", &x);
tot += x;
}
j -= (int)((log10(tot)) + 5);
while(j-- > 0) putchar(' ');
printf("%.3lf\n", tot);
}

return 0;
}