Question

c语言大神求救啊

#include <stdio.h>#include <math.h>double fun (double x){
}main(){ double x,s ; void NONO(); printf(“Input x: ”); scanf (“%lf”,&x); s=fun(x); printf(“s=%f\n”,s); NONO() }void NONO(){/*请在此函数内打开文件，输入测试数据，调用 fun 函数，输出数据，关闭文件。*/ FILE *rf, *wf ,int I ;double s, x; rf = fopen (“K:\\k28\\24100140\\in.dat”,”r”); wf = fopen (“K:\\k28\\24100140\\out.dat”,”w”); for (i=0;i<10;i++) { fascanf(rf,”%if”,&x); s=fun (x); fprintf(wf,”%if\n”,s); } fclose (rf); fclose(wf);}





Answer 1

很简单

double fun (double x)
{
double f, t; int n;
f=1.0+x;
t=x;
n=1;
do{
n++;
t *= (x-n+1)/n;
f += t;
}
while (fabs(t)>=1e-6);
return f;
}

追问

亲 不行啊 运行不起来啊

追答

不是上面错误

你下面很多中文，改正
#include
#include
double fun (double x)
{
double f, t; int n;
f=1.0+x;
t=x;
n=1;
do{
n++;
t *= (x-n+1)/n;
f += t;
}
while (fabs(t)>=1e-6);
return f;
}
void main()
{
double x,s ;
void NONO();
printf("Input x: "); scanf ("%lf",&x);
s=fun(x);
printf("s=%f\n",s);
NONO() ;
}
void NONO()
{/*请在此函数内打开文件，输入测试数据，调用 fun 函数，输出数据，关闭文件。*/
FILE *rf, *wf ;
int i ;
double s, x;
rf = fopen ("K:\\k28\\24100140\\in.dat","r");
wf = fopen ("K:\\k28\\24100140\\out.dat","w");
for (i=0;i<10;i++)
{
fscanf(rf,"%if",&x);
s=fun (x);
fprintf(wf,"%if\n",s);
}
fclose (rf); fclose(wf);
}

追问

与答案不符合啊？？？答案应该是1.100000

而且题目要求不能改动主函数main?

追答

#include
#include
double fun (double x)
{
double f, t; int n;
f=1.0;
t=x;
n=0;
do{
n++;
t *= (0.5-n+1)/n;
f += t;
}
while (fabs(t)>=1e-6);
return f;
}
void main()
{
double x,s ;
void NONO();
printf("Input x: "); scanf ("%lf",&x);
s=fun(x);
printf("s=%f\n",s);
NONO() ;
}
void NONO()
{/*请在此函数内打开文件，输入测试数据，调用 fun 函数，输出数据，关闭文件。*/
FILE *rf, *wf ;
int i ;
double s, x;
rf = fopen ("K:\\k28\\24100140\\in.dat","r");
wf = fopen ("K:\\k28\\24100140\\out.dat","w");
for (i=0;i<10;i++)
{
fscanf(rf,"%lf",&x);
s=fun (x);
fprintf(wf,"%lf\n",s);
}
fclose (rf); fclose(wf);
}

追问

还不行啊 亲 答案还是错的

追答

那答案错了，我检查了，不可能有错的

Answer 2

这个printf(“s=%f\n”,s);可以改为printf(“s=%.3f\n”,s);

而这个 fascanf(rf,”%if”,&x); 应该是fscanf