I got an error with this code. use option -std=c99 or std=gnuc99 to compile my code, please help.

Can you post your code, please? Something's amiss!

Steve.

Ok here it is.

#include <stdio.h>

int main()
{
    int many[] = { 2, 4, 8};
    int sum = 0;
    int i;
    for (int i=0; i < 3; i++) {
        sum += many[i];
        printf("sum %d\n", sum);
    }
    return 0;
}

You've declared i as an int twice - could that be the problem?

I removed the int i = 0; and I got the same error so that isn't the problem.

The C99 standard provides support for declaring the loop counter inside the loop, as you have done. That's good practice as the scope of the variable is limite to the loop itself, rather than the whole code block.

If you're not using C99 compliant code, you need to declare the variable outside the loop, as you have also done. I'm not sure which declaration you left in.

I'm trying to replicate the problem in Xcode right now - I'm also seeing if there's a preference somewhere to handle coding conventions like this.

I am using eclipse IDE on ubuntu.