run a command in cmd with c
//C library statement
#include <stdlib.h>
//Driver program
int main(void)
{
//The C command to run a command in cmd
system("Your command here");
}run a command in cmd with c
//C library statement
#include <stdlib.h>
//Driver program
int main(void)
{
//The C command to run a command in cmd
system("Your command here");
}compile c program code
# Compile Code
gcc filename.c
# Run code
.\a.execompile c program
$ gcc hello.c
$ ./a.outhow do i make my own c compiler
To make your own c compiler:
* First start with the lexer/tokenizer, it should turn code to tokens like this:
int main(){return 2;} => INT, SPACE_SEPARATOR, {IDENTIFIER, "main"}, OPENING_BRACE, RETURN_KEYWORD, {LITERAL, "2"}, CLOSING_BRACE
to do this make a list of tokens and translate code to tokens (i wrote all c tokens for my own c compiler)
* Second make a Parser:
it will turn tokens to an AST tree
you will use it to compile,
it ressembles this:
main.cpp << not important
|
main_entry: {name: "main", type: "function", return_type: "int"}
|
/
{return, type: "keyword"}
|
return value: {literal: "2", type: "int"}
* And third make an x86 code writer
it should translate the tree to x86
the result for our code in x86 is:
.globl _main
_main:
movl $2 %eax
ret
PS: i am not giving code so you can write your c compiler in any language, and also make you actually feel like you wrote it yourself instead of copy pastingCopyright © 2021 Codeinu
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