#include "stdio.h"main(){double a=1.0,i=1.0,sum=0.0,six;/*定义变量b为分母,i为循环变量，
sum为前6项和，six为第6项的值，并赋初始值*/do
{six=1/a;
sum=sum+six;
a*=3;
i++;
}while(i main() { double i,s=0.00, sa=0.00; for(i=0.00; ;i++) if(imain(){double i,s=0.00, sa=0.00;for(i=0.00; ;i++)if(i<6){sa=1/(double pow(double 3,double i)); /*sa是项数*/s+=sa;
/... |
