What is micro-C?

micro-C is simplified C language, stripped of certain functionalities that it contains. The very basic idea of micro-C is simplicity and avoidance of complicated language constructs in order to produce clean and understandable hypothetical assembly code.

Supported

Function definitions

int fibonacci (int x) {
	if (x <= 1) 
		return 1;
	return fibonacci(x - 1) + fibonacci(x - 2);
}

Global variable definition ( int and int * type)

int x = 1;
int main() {
	return x;
}

Local variable definition ( int and int * type)

int main() {
	int a = 1;
	int * b = 1;
	int c[] = {1, 2, 5};

	int r;
	int * d, e, f[], g = 3, h = r = 5;
}

Pass by value and pass by pointer

int swap(int * x, int * y) {
	int temp = *x;
	*x = *y;
	*y = temp;
}

Arrays

int arr[10];
int x = arr[5];

Arithmetic expressions

int x = 1;
int * y = malloc(sizeof(int));
* y = 1;
int z = ++x + *y;
z *= 3;
z = x << 2;

Logical expressions

if (!x && y > 2) {
	return 0;
} else {
	return function(x + y);
}

while (x--) {
	y += 2;
}

Parenthesis in arithmetic expressions

x = (y + z) * 3 / (q << 2);

Not supported

Pointer to a function

int foo(int x) {
	return x;
}

int bar() {
	int (*ptr2func)(int);
	ptr2func= foo;
	int x = ptr2func(2);
}

Pointer as a function return value

int * foo() {
	int * x = malloc(sizeof(int));
	*x = 1;
	return x;
}

Parenthesis in logical expressions

if (x == 1 && (y == 2 || z == 3)) {
	...
}

Standard input and output

printf();
scanf();

Directives

#include<stdio.h>

For loops

for (int i = 0; i < 10; i++) {
}

NULL keyword

int * x = NULL;