[SPCA] Fix various errors

semester3/spca/code-examples/00_c/00_basics/01_func.c

@@ -29,11 +29,11 @@ int get_user_input_int( char prompt[] ) {
         printf( "Hello World\n" );
     }
 
-    // Inversed while loop (executes at least once)
+    // Inverted while loop (executes at least once)
     do {
-        input_data -= 1;
+        input_data_copy -= 1;
         printf( "Bye World\n" );
-        if ( input_data_copy == 0 )
+        if ( input_data_copy == 10 )
             goto this_is_a_label;
     } while ( input_data_copy > 1 );
 

semester3/spca/code-examples/00_c/00_basics/05_pointers.c

@@ -30,6 +30,7 @@ int main( int argc, char *argv[] ) {
     assert( arr == &( arr[ 0 ] ) ); // Evaluates to true
     int new_arr[ 3 ] = arr;         // Compile time error (cannot use other array as initializer)
     int *new_arr_p = &arr[ 0 ];     // This works
+    void *t;
 
     a_function( &get_user_input_int, c_arr );
 

semester3/spca/code-examples/00_c/02_memory/01_mem-corruption.c

@@ -2,7 +2,7 @@
 
 int main( int argc, char **argv ) {
     int a[ 2 ];
-    int *b = malloc( 2 * sizeof( int ) ), *c;
+    int *b = (int *) malloc( 2 * sizeof( int ) ), *c;
     a[ 2 ] = 5;          // assign past the end of an array
     b[ 0 ] += 2;         // assume malloc zeroes out memory
     c = b + 3;           // mess up your pointer arithmetic