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Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Oct 20, 1998

Visual C++ 5.0 compatible with C?

Question:
I am studying C and C++ programming on my own. I have no previous programming experience. I am using Visual C++ 5.0 to run the following example "program 8.12" written in the book Programming in ANSI C, revised edition by S. G. Kochan. But Visual C++ 5.0 would not even compile it. Is this the backward compatibility problem of Visual C++ 5.0? There are 24 errors. The error started from "int i;" in the beginning of main(), it read "C2235 ';' in formal parameter list.

// Program 8.12
// Sort an array of intergers into ascending order.
#include 
void sort (int a[], int n)
{
	int i, j, temp;

	for (i = 0; i < n-1; ++i)
		for (j = i + 1; j < n; ++j)
			if (a[i] > a[j])
			{
				temp = a[i];
				a[i] = a[j];
				a[j] = temp;
			}
}

void main ()
( 
	int i;
	int array[16] = {34, -5, 6, 0, 12, 100, 56, 22, 44, -3, -9, 12, 17, 22, 6, 11};
	
	void sort (int a[], int n);

	printf ("The array before the sort:\n");
	
	
	for ( i = 0; i < 16; ++i)
	printf ("%i ", array[i]);

	sort (array, 16);

	printf ("\n\nThe array after the sort:\n");
	for ( i = 0; i < 16; ++i)
		printf ("%i ", array[i]);
	printf ("\n");
}

Answer:
Visual C++ 5.0 is indeed compatible with C and the code you posted looks pretty clean. There was just one problem: the line following void main () has an open parenthasis ("(") instead of an open curly brace ("{"). I changed it to a curly brace and it compiled just fine.

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