好吧，我正在用 C 语言编码并使用 Codeblocks。我正在尝试使用泰勒级数来计算 sinh(x) 来练习循环。我的程序运行，但在输入数字后，它遇到严重错误并崩溃。
我相当确定我的错误发生在通过在 getInput 函数中的第一个 scanf 行使用指针来分配值的过程中，这些行有问题:
printf ("please enter the value of x\n");
scanf ("%lf", *xPtr);
printf ("please enter the number of terms you would like to use\n");
scanf ("%lf", *nPtr);
我的整个乱七八糟的代码如下:
#include <stdio.h>
#include <math.h>
//Global declerations
double x, *xPtr = &x; //declares variable x and the x pointer
double n, *nPtr = &n; //declares variable n and the n pointer
//Function protypes
void getInput ();
double sinHyper ();
/*-------------------------------------------------------------
function: main
Description: calls the funtion getInput to get the input values, the
value of x and the number of terms (n), from the user.
main then calls calls the function sinHyper to compute
the value of sinh(x)
---------------------------------------------------------------*/
void main (shx)
{
// variable declarations
getInput();
double sinhx, *sinhxPtr;
*sinhxPtr = shx;
printf("sinh(%.6e)\n", *sinhxPtr);
}
void getInput (void)
{
printf ("please enter the value of x\n");
scanf ("%lf", *xPtr);
printf ("please enter the number of terms you would like to use\n");
scanf ("%lf", *nPtr);
while (*nPtr <= 0 ) {
printf ("please enter make sure to use at least 1 term(s) for the computation of sinhx \n");
scanf ("%lf", *nPtr);
}
}
double sinHyper ()
{
double shx, *shxPtr = &shx;
double i;
i = 1;
double priorTerm, *pTPtr; //pTPtr = PriorTermPointer
pTPtr = &priorTerm;
do
{
if ( i == *nPtr )
*shxPtr = *xPtr;
else
{
*pTPtr = *xPtr;
*pTPtr = ((pow((*xPtr), 2))/((2*i+1)*2*i))+(*pTPtr);
i = i + 1;
if (i != *nPtr)
{
*pTPtr = ((pow((*xPtr), 2))/((2*i+1)*2*i))+(*pTPtr);
i = i + 1;
}
}
}
while ( i != *nPtr );
if (*nPtr == 1)
return shx;
else
*shxPtr = *pTPtr;
return shx;
}
最佳答案
scanf 要求您发送数据保存的地址，例如:
int x;
scanf("%d", &x); // save to address of x
在您的示例中，您需要发送 x 的地址或指针(保存 x 的地址)
关于c - 使用 scanf 输入数字后遇到严重错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46938469/