Hello
I'm trying to compile a C code in terminal ,but I got this error

/tmp/ccoJICUV.o: In function `main':
exo2_main.c.text+0x76): undefined reference to `pow'
collect2: error: ld returned 1 exit status

although I wrote (#include "math.h") in the main

It should be in the math library. Add "-lm" to the command used to compile it.

1 members found this post helpful.

I agree. The rest of what I have to say only explains that answer. It doesn't replace that answer.

Both the declaration and the definition of the function are required.

math.h provides the declaration of the function at compile time in a way that requires the definition to be provided at link time.

The -lm provides access to the definition at link time.

We assume a single gcc command was used to both compile and link, so the -lm could be added to that command. If separate commands were used for compile and link, the -lm belongs on the link command.

2 members found this post helpful.

how can I add (-lm) to the command ??
the command which I used to compile is (gcc -o exo2 exo2.c exo2_main.c)

What part of "add it to the command" did you miss? gcc -o exo2 exo2.c exo2_main.c -lm

2 members found this post helpful.

the problem solved ,,,, thank you guys