refactored examples and readme

Author: vivekmaurya001

lib/node_modules/@stdlib/math/base/special/expf/README.md

@@ -171,17 +171,14 @@ float stdlib_base_expf( const float x );
 #include <stdio.h>
 
 int main( void ) {
-    float x[ 100 ];
+    float x;
     float v;
     int i;
-
-    for ( i = 0; i < 100; i++ ) {
-		x[ i ] = ( ( (float)rand() / (float)RAND_MAX ) * 100.0f );
-	}
     
     for ( i = 0; i < 100; i++ ) {
-        v = stdlib_base_expf( x[ i ] );
-        printf( "e^%f = %f\n", x[ i ], v );
+        x = ( (float)rand() / (float)RAND_MAX ) * 100.0f;
+        v = stdlib_base_expf( x );
+        printf( "e^%f = %f\n", x, v );
     }
 }
 ```