Question

第九题怎么写🌚

Answer 1

#include <stdio.h>
int main()
{
int n, i;

float x, xn, ans = 0;

scanf ("%d%f", &n, &x);

for (i = 1, xn = x; i <= n; ++i) {

ans += xn;

xn *= x;
}
printf ("%f\n", ans);

return 0;

}

追问

ans+什么意思

能翻译成最普通的那一种吗 刚学

谢谢你

追答

#include
int main()
{
int n, i;

float x, xn, ans = 0;

scanf ("%d%f", &n, &x);
xn = x;

for (i = 1; i <= n; ++i) {

ans = ans + xn;

xn = xn * x;
}
printf ("%f\n", ans);

return 0;

}