Something horrifying I created as an extension exercise my first semester learning C.

sort_gen.c

#include <stdio.h>

void print_prototype(int num_elements);
void print_func(int num_elements);
void sort_func_generator(int num_elements);

int main(int argc, char *argv[]) {
	int num_ints;
	scanf("%d", &num_ints);
	sort_func_generator(num_ints);
	return 0;
}

void sort_func_generator(int num_elements) {
	int i;

	printf("#include <stdio.h>\n\n");

	/* function prototypes */
	printf("void int_swap(int *p1, int *p2);\n");
	for (i=2; i<=num_elements; i++) {
		print_prototype(i);
	}

	printf("\n");
	printf("int main(int argc, char *argv[]) {\n");

	/* declare int variables to be sorted */
	printf("	int ");
	for (i=1; i<num_elements; i++) {
		printf("i%d, ",i);
	}
	printf("i%d;",i);

	printf("	printf(\"enter %d numbers to sort:\\n> \");\n", num_elements);
	printf("	scanf(");
	for (i=1; i<num_elements; i++) {
		printf("%%d ");
	}
	printf("%%d\", ");

	for (i=1; i<num_elements; i++) {
		printf("&i%d, ",i);
	}
	printf("&i%d);\n",i);

	printf("	intsort%d(",num_elements);
	for (i=1; i<num_elements; i++) {
		printf("&i%d, ",i);
	}
	printf("&i%d);\n",i);

	printf("	printf(\"\\ninput has been sorted:\\n\", ");
	for (i=1; i<num_elements; i++) {
		printf("i%d, ",i);
	}
	printf("i%d);\n",i);
	
	printf("	return 0;\n");

	/* end main function */
	printf("}\n\n");

	/* intswap */
	printf("void int_swap(int *p1, int *p2) {\n");
	printf("	tmp = *p1;\n");
	printf("	*p1 = *p2;\n");
	printf("	*p2 = tmp;\n");
	printf("}\n\n");

	/* intsort2 */
	printf("void intsort2(int *p1, int *p2) {\n");
	printf("	if (*p2>*p1)\n");
	printf("		int_swap(p1, p2);\n}\n\n");

	/* all the other intsorts */
	for (i=3; i<=num_elements; i++) {
		/* TODO */
		print_func(i);
	}

}

void print_prototype(int num_elements) {
	int i;

	printf("void intsort%d (", num_elements);
	
	for (i=1; i<num_elements; i++) {
		printf("int *p%d, ", i);
	}

	printf("int *p%d);\n", i);
}

/* assumes a minimum input of 3, since intsort2 looks different */

void print_func(int num_elements) {
	int i, j;

	printf("void intsort%d (", num_elements);
	
	/* add parameters */
	for (i=1; i<num_elements; i++) {
		printf("*p%d, ", i);
	}
	printf("*p%d) {\n", i);

	/* first function call */
	printf("	intsort%d(", num_elements-1);
	for (j=1; j<num_elements-1; j++) {
		printf("p%d, ", j);
	}
	printf("p%d);\n", j);

	/* second function call */
	printf("	intsort%d(", num_elements-1);
	for (j=2; j<num_elements; j++) {
		printf("p%d, ", j);
	}
	printf("p%d);\n", j);

	/* aaaand third (same as first) */
	printf("	intsort%d(", num_elements-1);
	for (j=1; j<num_elements-1; j++) {
		printf("p%d, ", j);
	}
	printf("p%d);\n", j);

	/* close body */
	printf("}\n");
}