Error of LCD interfacing in C.c(9): error C267: 'lcdcmd': requires ANSI-style prototype

Hello Sir I am getting error compiling LCD interfacing in C.c... LCD interfacing in C.c(9): warning C206: 'lcdcmd': missing function-prototype LCD interfacing in C.c(9): error C267: 'lcdcmd...
Error of LCD interfacing in C.c(9): error C267: 'lcdcmd': requires ANSI-style prototype

Hello Sir I am getting error compiling LCD interfacing in C.c... LCD interfacing in C.c(9): warning C206: 'lcdcmd': missing function-prototype LCD interfacing in C.c(9): error C267: 'lcdcmd...
MISSING FUNCTION PROTOTYPE AND REQUIRE ANSI-TYPE PROTOTYPE

COMPILE TIME ERROR::mini project.c(49): warning C206: 'lcddata': missing function-prototype ::mini project.c(49): error C267: 'lcddata': requires ANSI-style prototype PROGRAM #include<reg51.h...
MISSING FUNCTION PROTOTYPE AND REQUIRE ANSI-TYPE PROTOTYPE

COMPILE TIME ERROR::mini project.c(49): warning C206: 'lcddata': missing function-prototype ::mini project.c(49): error C267: 'lcddata': requires ANSI-style prototype PROGRAM #include<reg51.h...
Adding // style comment

I would like to request on the next update of the ARM tools that a check box be added to allow "// style comments". This has been added to the C99 standard. This way, Stict ANSCI C can be checked...