docs: fix errors in various C examples

PR-URL: 	#1691
Reviewed-by: Athan Reines <kgryte@gmail.com>

lib/node_modules/@stdlib/math/base/special/ceiln/examples/c/example.c

@@ -19,7 +19,7 @@
 #include "stdlib/math/base/special/ceiln.h"
 #include <stdio.h>
 
-int main() {
+int main( void ) {
 	const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
 
 	double y;

lib/node_modules/@stdlib/math/base/special/ceiln/src/ceiln.c

@@ -33,7 +33,7 @@
 // VARIABLES //
 
 static const double MAX_INT = STDLIB_CONSTANT_FLOAT64_MAX_SAFE_INTEGER + 1.0;
-static const double HUGE = 1.0e+308;
+static const double HUGE_VALUE = 1.0e+308;
 
 
 // MAIN //
@@ -91,11 +91,11 @@ double stdlib_base_ceiln( const double x, const int32_t n ) {
 	// If we overflow, return `x`, as the number of digits to the right of the decimal is too small (i.e., `x` is too large / lacks sufficient fractional precision) for there to be any effect when rounding...
 	if ( n < STDLIB_CONSTANT_FLOAT64_MIN_BASE10_EXPONENT ) {
 		s = pow( 10.0, -( n + STDLIB_CONSTANT_FLOAT64_MAX_BASE10_EXPONENT ) ); // TODO: replace use of `pow` once have stdlib equivalent
-		y = ( x * HUGE ) * s; // order of operation matters!
+		y = ( x * HUGE_VALUE ) * s; // order of operation matters!
 		if ( stdlib_base_is_infinite( y ) ) {
 			return x;
 		}
-		return ( stdlib_base_ceil( y ) / HUGE ) / s;
+		return ( stdlib_base_ceil( y ) / HUGE_VALUE ) / s;
 	}
 	s = pow( 10.0, -n ); // TODO: replace use of `pow` once have stdlib equivalent
 	y = x * s;

lib/node_modules/@stdlib/math/base/special/floorn/examples/c/example.c

@@ -19,7 +19,7 @@
 #include "stdlib/math/base/special/floorn.h"
 #include <stdio.h>
 
-int main() {
+int main( void ) {
 	const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
 
 	double y;

lib/node_modules/@stdlib/math/base/special/floorn/src/floorn.c

@@ -33,7 +33,7 @@
 // VARIABLES //
 
 static const double MAX_INT = STDLIB_CONSTANT_FLOAT64_MAX_SAFE_INTEGER + 1.0;
-static const double HUGE = 1.0e+308;
+static const double HUGE_VALUE = 1.0e+308;
 
 
 // MAIN //
@@ -134,11 +134,11 @@ double stdlib_base_floorn( const double x, const int32_t n ) {
 	// If we overflow, return `x`, as the number of digits to the right of the decimal is too small (i.e., `x` is too large / lacks sufficient fractional precision) for there to be any effect when rounding...
 	if ( n < STDLIB_CONSTANT_FLOAT64_MIN_BASE10_EXPONENT ) {
 		s = pow( 10.0, - ( n + STDLIB_CONSTANT_FLOAT64_MAX_BASE10_EXPONENT ) ); // TODO: replace use of `pow` once have stdlib equivalent
-		y = ( x * HUGE ) * s; // order of operation matters!
+		y = ( x * HUGE_VALUE ) * s; // order of operation matters!
 		if ( stdlib_base_is_infinite( y ) ) {
 			return x;
 		}
-		return ( stdlib_base_floor( y ) / HUGE ) / s;
+		return ( stdlib_base_floor( y ) / HUGE_VALUE ) / s;
 	}
 	s = pow( 10.0, -n ); // TODO: replace use of `pow` once have stdlib equivalent
 	y = x * s;

lib/node_modules/@stdlib/math/base/special/min/examples/c/example.c

@@ -17,6 +17,7 @@
 */
 
 #include "stdlib/math/base/special/min.h"
+#include <stdlib.h>
 #include <stdio.h>
 
 int main( void ) {
@@ -31,4 +32,4 @@ int main( void ) {
         v = stdlib_base_min( x, y );
         printf( "x: %lf, y: %lf, min(x, y): %lf\n", x, y, v );
     }
-}
+}

lib/node_modules/@stdlib/math/base/special/minabs/examples/c/example.c

@@ -17,6 +17,7 @@
 */
 
 #include "stdlib/math/base/special/minabs.h"
+#include <stdlib.h>
 #include <stdio.h>
 
 int main( void ) {
@@ -31,4 +32,4 @@ int main( void ) {
         v = stdlib_base_minabs( x, y );
         printf( "x: %lf, y: %lf, minabs(x, y): %lf\n", x, y, v );
     }
-}
+}