The starting asterisk indicates that the data is to be read from the stream but ignored (i.e. it is not stored in the location pointed by an argument). Reference: http://www.cplusplus.com/reference/cstdio/scanf/ So the data would not be saved in the variable. 1 solved What does %*c do when getting input from stdin? [closed]
As mentioned you can’t call substr() with a std::ifstream. What you probably meant was to take the parts from the line string read in a[i]= stoi(line.substr(4,2)); name[i]= line.substr(18,15); b[i]= stoi(line.substr(36,1)); Also note you’ll need to convert the substrings extracted to a number (instead of assigning them directly), hence I have added the stoi(). As also … Read more
Here’s a brief table of how pointers map to normal (i.e. non-pointer variables) and vice versa (assume you’ve declared the pointer as int *varptr and your regular variable as int v): Dereferencing a pointer: *varptr v Passing the variable by reference: varptr &v Leave a comment if you have further questions and I’ll do my … Read more
You need to set new variables for score and round. When myFunction() calculates the result, you would add one to the round variable regardless, and one to the score only if you win. You would then calculate if the round is greater than ten, in which case you’d call a new function to handle the … Read more
It seems you are new to the world of programming. “sys.argv” is used to take Command Line Arguments. when you run as “python sample.py”, the variable sys.argv will be a single element list i.e. [“sample.py”] len(sys.argv) is 1 in this case The Expected Working of the program is: when you run as “python sample.py fileToRead.txt”, … Read more
amount = int(input(“Enter the amount of numbers that you have: “)) numbers = [] for i in range(amount): new = input(‘Enter number {}: ‘.format(i+1)) numbers.append(new) print(numbers) You should probably do some reading on loops in Python. 2 solved Python take a variable number of inputs? [closed]
You can count the length of the string using function len. str can contain all chars and letters. Try the following code: word = input(“Waiting for input: “) print(“Found “+str(len(word))+” letters!”) Testing it: Waiting for input: hello Found 5 letters! Testing it with numbers and other chars: Waiting for input: hello123!@# Found 11 letters! 2 … Read more
if you have the line already, it’s easiest to use sscanf() to do this: long a, b; if(sscanf(line, “%ld,%ld”, &a, &b) == 2) { /* Successfully parsed two long integers, now store them somewhere I guess. */ } Note that it’s a good idea to check the return value of sscanf(), this protects you from … Read more
Using a regex would work like this: import re regex = r’\d-\d{4}-\d{4}-\d’ preg = re.compile(regex) s1 = ‘9-9715-0210-0’ s2 = ‘997-150-210-0’ m1 = preg.match(s1) m2 = preg.match(s2) if m1: print(‘String s1 is valid’) else: print(‘String s1 is invalid’) if m2: print(‘String s2 is valid’) else: print(‘String s2 is invalid’) You can try the code at … Read more
What you suggest actually works as is: >>> x=1 >>> eval(input()) print(x) 1 Another method you can have a look at is the exec method (and above that is a detailed description for eval). Depending on what you are going for this might be a bad idea though. Have a look at the local and … Read more
a fast google search popped up this example https://www.mkyong.com/java8/java-8-stream-read-a-file-line-by-line/. for each line you get a String. split the string on whitespace: String[] lineArr = line.split(” “); Then use the 3 values in the array to create your stuff. easy peasy 🙂 0 solved Taking input of a graph from text file in java till the … Read more
By default, the file gets created where ever the project files are for visual studio. because of $(ProjectDir) specified in Working Directory setting. consider: right-click on your project -> Properties -> configuration properties -> Debugging -> Working Directory always make sure you are changing/viewing the active configuration and active platform setting in that window by … Read more
You should search for “beginning linux” to get some web sites that will give you the basics of navigating around in Linux, notably on the command line. Then I’d search for “beginning vi” to learn the basics of the vi editor. If you’re using a GUI, then you can simply use their simple GUI text … Read more
You have: A program (python script) N (9) files to process with the program 1 argument (input) for the program Now, you want to run the script from command line for N (9) files with the same argument, right? My suggestion will be writing another script to run the script for that N files with … Read more
Not sure if this is what you mean. But I’ve created a sample here where every click event it will get the value of the input fields. <input type=”text” id=”name”/> <input type=”text” id=”number”/> <button id=”getvalue”>Get value</button> Here’s the js $(document).ready( function(){ $(‘#getvalue’).click( function() { var nameVal = $(‘#name’).val(); var numVal = $(‘#number’).val(); if(nameVal == ” … Read more