Program doesn't run quite right

Question

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Hello everyone I'm having a small issue with my program here. For my output for this program I'm getting 0,000000 ^ 0.00000000 = a random negative number. Any help with this program would be appreciated. Also as a side note I'm having to compile this with a -lm because with out it I get an

VB

/tmp/ccwyE4mh.o: In function `power':
a10p2.c:(.text+0xb2): undefined reference to `pow'
collect2: error: ld returned 1 exit status

XML

#include <stdio.h>
#include <math.h>
double power(double x, double n);
int main(void)
{
int x,n;
printf("insert base: ");
scanf("%lf",&x);
printf("insert power: ");
scanf("%lf",&n);
double powerresult = power(x,n);
printf("%lf ^ %lf = %lf\n");
return 0;
}
double power(double x, double y)
{
double result;
result = pow(x,y);
return result;

Posted 13-Apr-15 16:48pm

sparton07sev

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Sergey Alexandrovich Kryukov 13-Apr-15 23:47pm

There is no a single ^ operator in your code sample. What are you talking about?
—SA

1 solution

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User 59241 · Accepted Answer · 2015-04-13T17:05:00

Solution 1

Mian issue is you have provided no input for printf. Which compiler are you using?

https://msdn.microsoft.com/en-us/library/wc7014hz.aspx[^]

C++

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

double power(double x, double n);

int main(void)
{
	int x,n;
	printf("insert base: ");
	scanf("%ld",&x);

	printf("insert power: ");
	scanf("%ld",&n);

	printf("%ld ^ %ld = %lf\n", x, n, power(x,n));

	return 0;
}

double power(double x, double y)
{

	return pow(x,y);

}

Posted 13-Apr-15 17:05pm

User 59241

Updated 13-Apr-15 17:08pm

v4

Comments

sparton07sev 13-Apr-15 23:36pm

I'm using putty to write all my programs.

[no name] 13-Apr-15 23:49pm

That's a terminal program. You are running a compiler from there.

sparton07sev 13-Apr-15 23:40pm

Also thanks for helping.

[no name] 13-Apr-15 23:50pm

Any time.