So I am currently learning how to program in c and till now I've been making great process. I decided to make myself a matrix in which a character ('0') can be freely moved around using wasd.
Now there is the issue of keys repeating themselves making it impossible to move into two directions. Perhaps you know how if you hold a key on your keyboard it repeats itself quickly. This causes if I press for example w and a to fist go one up and then just to the left and not vertically. Is there any sort of argument that I can put in my code to prevent this (I'm using getchar())
I'm currently learning LabView in college and I saw this simulated there on class notes. I've been absent the day this has been asked:
I asked my friends, but no one explained well. All they said: do not forget that when the user inputs a number to the control on front panel, he needs to press outside or enter to take effect.
Can anyone explain to me in detail the function of this program from logic design and user perspective?
There is a while loop that is controlled by the "stop 2" button. Within that outer while loop is a sequence structure that contains 3 frames.
Frame 1. A while loop that continuously samples the control named "x", adds five to the value of "x" and puts the result in the indicator named "x+y". If the user presses the stop button, the program will exit the while loop and move to the next frame for execution.
Frame 2. Pause for 10000 milliseconds.
Frame 3. After the pause, a local variable reads the value of the "x" control and writes it to an indicator named "x2"
This will repeat while the "stop 2" button is in a false state.
like this code
fp1=fopen("Fruit.txt","r");
if(fp1==NULL)
{
printf("ERROR in opening file\n");
return 1;
}
else
{
for(i=0;i<lines;i++)//reads Fruits.txt database
{
fgets(product,sizeof(product),fp1);
id[i]=atoi(strtok(product,","));
strcpy(name[i],strtok(NULL,","));
price[i]=atof(strtok(NULL,","));
stock[i]=atoi(strtok(NULL,"\n"));
}
}
fclose(fp1);
These symbols sound too similar to differentiate their function,can anyone helps me by any method, or use names of shape according to this site http://www.breezetree.com/article-excel-flowchart-shapes.htm
REF:
Used a random online tool to generate this flowchart from your code. http://code2flow.com/
Study more about flowcharts here : http://creately.com/blog/diagrams/flowchart-guide-flowchart-tutorial/
See sample flowcharts here : http://www.conceptdraw.com/samples/flowcharts
Back in the days of FORTRAN, we used that hexagonal symbol on the page you linked to for the "DO" loop, which is basically the same as the modern "for" loop.
So, to draw the loop part of your program I would use that symbol, with a note inside like this:
for i = 0 --> (lines - 1)
Read this as "for i from 0 to (lines - 1)" with the increment of 1 implied by default.
Then the bottom-most box in the loop would have two arrows coming out of it: one straight down to the next statement, and one out the side heading back up to the side of the hexagon.
You could use the diamond to represent "if", but that can obscure the meaning of what you are trying to do, namely execute the loop a certain number of times.
BTW, I don't have high enough reputation yet to post images, so you will have to either follow the link or visualize a hexagon whose center section has been stretched horizontally.
Update: I see that, while I was typing my answer, thecbuilder has also answered this, with a real flowchart. His illustrates how the loop actually works internally, which is fine; mine was intended to show the meaning of the loop on a slightly higher level of abstraction.
I have developed a graphic userinterface for a small program in c. Its some kind of calculator. I have two inputfields where one can enter numbers and I want to display the result as a text-label in the same window.
I do not know how to make the window or the text-label to update itself. I am used with GUIS in java and there are a method called invalidate() to refresh the window and its child-items? Is there a similar function in the gtk3-lib in c?
I don't understand. I think there is a button to press after entering numbers in inputfields, am i right? If so, just connect a function to the button clicked signal.
This function make the sum of 2 numbers and set the label text.
If you don't have the button, i think you need to connect the signal to the inputfields, something like:
"on_spinbutton1_value_changed" : update_text_label
P.S.
I don't know C, usally i use python, but i think is quite similar.
P.P.S.
Is this the same question founded here?
I may have worded that strange, but if you need clarification I can provide it. I'm a complete noob to coding and am learning to use C language.
I have printed out a menu of options for the user to select. The user input is read and stored into a character array. I then printed out the string back to the user. So far everything works to this point.
My issue is selecting an option based on this character input.
I tried using strcmp inside if-else statements but never get the correct output.
Can someone point me into the right direction?