Đề: Tính S(n) = ½ + ¾ + 5/6 + … + (2n - 1)/ (2n)
Example code:
#include<stdio.h>
#include<conio.h>
int main()
{
int i, n;
float S;
S = 0;
i = 0;
do
{
printf("\nNhap n: ");
scanf("%d", &n);
if(n < 1)
{
printf("\nN phai lon hon hoac bang 1. Xin nhap lai !");
}
}while(n < 1);
while(i < n)
{
S = S + (float)(2 * i + 1) / (2 * i + 2);
i++;
}
printf("\nTong la %f", S);
getch();
return 0;
}