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Questions - math.h

arm cortex log10 function sometimes returns 0

I'm using stm32f4xx mcu with <math.h> lib when I convert the mW to dBm, used log10f() function but, the log10 function return value is not valid occasionally. here is my code: volatile float pow...
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박동진

c

arm

math.h

Votes: 0

Answers: 0

Unable to use exp() with a variable

This has been solved I am trying to use exp() from math.h in C, but it is failing to compile whenever I pass a variable as the argument. The following code works just fine #include <math.h> #inc...
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MrGorbunov

c

function

compiler-errors

arguments

math.h

Votes: 0

Answers: 0

Power function giving different answer than math.pow function in C

I was trying to write a program to calculate the value of x^n using a while loop: #include <stdio.h> #include <math.h> int main() { float x = 3, power = 1, copyx; int n = 22, copyn...
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Abir Mondal

c

pow

math.h

Votes: 0

Answers: 4

Latest Answer

When I run your code I get this: 3^22 = 31381059584.000000 3^22 = 31381059609.000000 This would be because pow returns a double but your code uses float. When I changed to powf I got identical result...
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Lundin

Why pow() function working correctly, only after saving it to a variable?

I were asked to c-program to accept two variables and print the answer when second variable is raised to the power of first variable. So I coded, #include<stdio.h> #include<math.h> int x,...
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ADHIROOBAN D

c

variables

undefined-behavior

pow

math.h

Votes: 0

Answers: 1

Latest Answer

pow returns a double, therefore causing undefined behavior because you pass it to a format string expecting an int, since typeof(pow(int,int)) == double. Try printf("%lf\n", pow(3,5)); or u...
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