How to Prevent Stack Overflow Errors in a C Program

Proof this works:

Program to print each input word on a seperate line
main(c,l){
	putchar('\n'*(l>32&c<33));	
	putchar(c*(c32));
	asm("pop %r15");
	asm("pop %r15");
	asm("pop %r15");
	asm("pop %r15");
	main(getchar(),c);
}

//this program can process the entire king james bible
//(also prints newline for every space as well)
main(c,l){
	putchar('\n'*(l>32&c<33));	
	putchar(c*(c>32));
	main(getchar(),c);
}

//this program can only process the first 500K 
//chars of the king james bible before stack overflow

The best of both worlds

main(char c,char l){
	putchar('\n'*(l<32&c>33)|c*(c<32));	
	asm("call getchar@plt\nmovl -0x4(%rbp), %esi\nmovl %eax, %edi\npop %rax\npop %rax\npop %rax\njmp main");
}

//no stack overflow with proper behaviour
main(c,l){ main(getchar(putchar(10*(l>32&c<33)|c*(c>32))),c); } //bonus one line program