Hi Maria,
Just compiling your code I was able to find the following
errors. Fix the #include statement (line 25)
and things will look better on the next compile. Line
number are approximate location.
Regards,
Charles Bannister

void send_radio_msgm(char msgm_char)  	// line 270 defined twice 
char i; 				// Variable i declared but never used line 212
void send_radio_msgm(char msgm_char)	// declared but never used line 210
} missing in 'for'			// missing } in for loop line 216
#include                        	// bad file specification line 25
					// (include what?) #include<reg52.h> maybe