XCode. Standard Tool Project Template

It was really a great day :) when I found out how to make C-projects in Xcode.
This tutorial explains things better than me:
What's Your Function?
It shows how to create Standard Tool project in Xcode and how make a simple C program. For example as the following:

#include <stdio.h>

int integerForSeedValue(int seedValue)
{
    return seedValue - 3;
}

int main (int argc, const char * argv[]) {
    int favoriteNumber = (3 + 4) / 2;
    favoriteNumber = integerForSeedValue(favoriteNumber + 2);
    printf("My favotite number is %d\n", favoriteNumber);
    return 0;
}

It works and the output is "My favorite number is 2." I can launch this program from Finder and see the terminal window: