Beg you take a look at why couldn't get into the cycle-CodePudding

#include
#include
#include

Fac (int n);

Int main ()
{
Float x, f, funcvalue, approx=0;
Int n=0;

Cout<& lt;" Both please enter the index of e: "& lt; Cin> x;
Funcvalue=https://bbs.csdn.net/topics/exp (x);
Cout
While ((abs (approx - funcvalue)) & lt; 1 e - 12)
{

F=fac (n);
Approx=(x, n) approx + pow/f;
N++;

}

Cout<& lt;" E ^ "& lt; return 0;
}

Fac (int n)
{
Float f;
If (n==0)
return 1;
The else
F=fac (n - 1) * n;
Return the f;
}

CodePudding user response:

 abs (approx - funcvalue)) & lt; 1 e - 12

you want to ensure that this condition is met can go in, you input - 13, you can go in... And your fac (int n) didn't write a return type, not an error? The correct writing is float fac (int n);

CodePudding user response:

Should be greater than the right, while ((abs (approx - funcvalue)) & gt; 1 e - 12)

CodePudding user response:

While ((abs (approx - funcvalue)) & gt; 1 e - 12) set breakpoints, step through look at the conditions to meet?

CodePudding user response:

Fac function has no return value type?

CodePudding user response:

Abs is the absolute value function of integer and floating point Numbers is fabs, this phrase: while ((abs (approx - funcvalue)) & lt; 1 e - 12) change, change to the while ((fabs (approx - funcvalue)) & lt; 1 e - 12), you continue to check there are no other errors