CS50x 2025 - Lecture 1 - C

all right this is cs50 uh this is week one because of course last week was week zero and this is the week where we'll actually start programming in a much more traditional way that programming language we promised called C of course we started with with this and hopefully by now with problem set one you've had a Beyond sort of making things feel very accessible and user friendly is really to elucidate some of the fundamental concepts that we'll see again today and really every week subsequently like functions and conditionals and loops and variables and so much more and in fact among the goals of scratch is again to kind of plant these visuals in your mind so even as today onward feels all the more like a fire hose especially when it comes to really weird cryptic textual syntax the ideas are still going to be there is somewhere in this folder a file called hello.c so you should not type make hello.c you just type make hello and then this third command even more cryptic what might it do if this is step three of three run the machine code that's going to run the machine code it's going to tell the computer in this folder sort of the dot implies this current folder and do SL just means means something in this current folder run the program called hello so that's it like there's three steps to writ ing a program in C you create the file as with the code command but there are other ways to do that too and you don't even have to use VSS code you can use dozens of other alternative programs in the world you run the compiler which in this case is called make a little white lie make is not actually the compiler but more on that next week but make is going to re uh trigger compilation of this code and the last step three is to execute or run the program called hello so let me go back to vs code here and you'll see that my code is still at the top my terminal windows at the bottom I hid my file explorer just because it's not that interesting anymore and I'm going to do what you proposed which was m- a k space hello all thankfully nothing