Hello, I am trying to test this program with gcc -Wall -Im but it is showing me

Question

Hello, I am trying to test this program with gcc -Wall -Im but it is showing me this error "/tmp/cctn74rT.o: In function `main': voltage.c:(.text+0x42): undefined reference to `exp' collect2: ld returned 1 exit status"

this is the program

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

// defining the constants

#define V 10

#define R 3000

#define C 50 * pow(10,-6)

#define tau 0.15

int main()

{

//declaring the data types

float t, vt;

// displaying the header of the table

printf("Time (sec) voltage ");

// loop to calculate the voltage vt per the provided equation , 1/15 = 0.0666

for (t=0;t<=1;t=t+0.0666)

{

vt=V*(1 - exp(-t/tau));

// displaying data

printf("%0.02f %0.02f ",t,vt);

}

return 0;

}

// end

Explanation / Answer

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

// defining the constants

#define V 10

#define R 3000

#define C 50 * pow(10,-6)

#define tau 0.15

int main()

{

//declaring the data types

float t, vt;

// displaying the header of the table

printf("Time (sec) voltage ");

// loop to calculate the voltage vt per the provided equation , 1/15 = 0.0666

for (t=0;t<=1;t=t+0.0666)

{

vt=V*(1 - exp(-t/tau));

// displaying data

printf("%0.02f %0.02f ",t,vt);

}

return 0;

}

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