Question

C语言：图片上的题目咋编程？

Answer 1

代码文本：

#include "stdio.h"

int main(int argc,char *argv[]){

double s,t,x,d=0.00001,tt;

int n;

printf("Please enter x(R: x>1.0)...\nx=");

if(scanf("%lf",&x)==1 && x>1.0){

for(s=0.0,t=n=1;(tt=t*n)>=d;t/=x,n++)

s += n&1 ? tt : -tt;

printf("The result are %f\n",s);

}

else

printf("Input error, exit...\n");

return 0; 

}

Answer 2

#include <stdio.h>

#include<math.h>

int main()

{

int i;

float x, S = 0;

scanf("%f", &x);

if (x > 1)

for (i = 1; i / pow(x, i - 1) >= 1e-5; i++)

S = S + pow(-1, i - 1) * i / pow(x, i - 1);

printf("第%d项精度满足条件\n", i - 1);

printf("满足精度的计算结果为%f\n", S);

return 0;

}

Answer 3

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

double cal(double x){
double intr = pow(10,-5);
int n=1;
double v=0.0;
double sigv=0.0;
while (1){
sigv =pow(-1,n)*((n+1)/pow(x,n));
if (fabs(sigv)<intr) break;
v += sigv;
n++;
}
return 1.0-v;
}

int main()
{
printf("%lf",cal(1.2));
}