使用C中的pow函数查找数字的立方根。 [英] Finding cube root of a number using pow function in C.

问题描述

#include<stdio.h>
#include<math.h>
 
main()
{
    float a,b;
     
    printf("Enter a number : ");
    scanf("%d",&a);
     
    b = pow(a,(1/3));
     
    printf("The cube root of a given number is : %f",b);
}

我的尝试：



我尝试过使用括号。使用1.0 / 3.0,0.33

What I have tried:

I have tried using parenthesis. Using 1.0/3.0 , 0.33

推荐答案

使用 float 变量 pow 毫无意义。尝试

Using float variables with pow is pointless. Try

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

int main()
{
  double a, b; // pow takes doubles

  printf("Enter a number : ");

  if ( scanf("%lf",&a) == 1 )
  {
    b = pow(a,(1.0/3));
    printf("The cube root of %lf number is : %lf\n", a, b);
  }

  return 0;
}

这很简单：

It's pretty simple:

b = pow(a, 1.0 / 3.0);

甚至

b = pow(a, 1 / 3.0);

我明白了。而不是使用1/3或1.0 / 3.0，你应该使用0.333。你会得到正确的答案。

I got it. Instead of using 1/3 or 1.0/3.0 you should use 0.333. You will get the right answer.

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

main()
{
    float a,b;
    
    printf("Enter the number you want to find cube root of : ");
    scanf("%f",&a);
    
    printf("The number you entered is : %.2f\n",a);
    
    b = pow(a,0.333);
    
    printf("The cube root of the number = %.2f",b);
}

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