keil c (memcpy and fmod) problems

[lgeorge123]

keil string pointers

I wrote a keil c and compiled it and there are some errors .
#include <reg51.h>
#include <string.h>
#include <stdio.h>
unsigned char deg;
unsigned char font1[]={2,0,3,5};
unsigned char adr;
unsigned char k;
void rr()
{
memcpy(deg,font1[adr],1); compiler said illegal pointer
k=fmod(deg,2); compiler said missing function-prototype
......
}

Can someones give me suggestions ???? Thanks !!!!

 

[Encrypted]

keil missing function prototype?

memcpy destination and source must be pointers.

https://www.keil.com/support/man/docs/c51/c51_memcpy.htm

fmod is in the math library, #include <math.h> and both arguments must be floats.

https://www.keil.com/support/man/docs/c51/c51_fmod.htm

 

[davidgrm]

memcpy microcontroller

Try:

memcpy(&deg,&font1[adr],1);