int

问题 I have problem in reading 2D text from file and import it to an int array. Specifically, my text file looks like below: 2,3,4,5,6 5,2,3,4,5 2,4,6,7,4 2,7,8,5,6 So each cell in matrix is separated by comma and each new row starts with new line. I tried many ways to make it works but I can't! Simply, I want an int[][] or int[,] array at the end. P.S: I can read 1-D matrix simply to int[] as below: int[] array= File.ReadAllText(fileppath).Split(',').Select(t => int.Parse(t)).ToArray(); 回答1: //

问题 The compiler is throwing ClassCastException: String cannot cast be to an int on line 96 of the below. I cannot for the life of me figure out why, and any help would be really appericiated. code: public class Progress extends Activity { private TextView names, current, goal, start; private EditText updateBox; private ProgressBar progress; private String currentWeight, goalS, startS; private int currentWeightInt, weightUpdate; protected void onCreate(Bundle savedInstanceState) { super.onCreate

问题 It is well documented in numerous that str is required to convert ints to strings before they can be concatenated: 'I am ' + str(n) + ' years old.' There must be a fundamental reason why Python does not allow 'I am ' + n + ' years old.' and I would like to learn what that reason is. In my project, I print a lot of numbers and end up with code like this. 'The GCD of the numbers ' + str(a) + ', ' + str(b) + ' and ' + str(c) + ' is ' + str(ans) + '.' It would be much prettier if I could drop

问题 I thought it was a coincidence at first so I wrote up a test to try it out and it's true, I ran it 1 million times and every single time the set came back ordered and sorted. This only occurs when you use integers from 0-9 as soon as an integer > 9 is inserted then any integers inserted after will not be sorted. Why is this? Also for floats it kind of sorts it but isn't right all the time, so weird I thought they were completely unordered. Any advice on why 0-9 is sorted every time would be

问题 This question already has answers here : What's the best way to do a reverse 'for' loop with an unsigned index? (20 answers) Closed 5 years ago . When I put the following in my program: for (size_t i = VectorOfStructs.size()-1; i > 0; i--) It works correctly but does "i" will never equal 0. So, I cannot access the first element (VectorOfStructs[0]). If I change it to: for (size_t i = VectorOfStructs.size()-1; i > -1; i--) The program doesn't even enter the for loop! But, if I change it to the

问题 I have a program that uses a formula to calculate the refurb on a unit (parts replaced on cableboxes that were damaged) divided by total units (cableboxes that went through refurb, but did not have any parts replaced). I looked up casting online, and the format for it is: int valuetoconvert = Convert.ToInt32; I'm doing that, but I still get the following error: Cannot implicitly convert type 'double to int. An explicit conversion exists(are you missing a cast?) What am I doing wrong? Can

问题 I have two overloaded function like below: void print(int i) { ... } void print(float f) { ... } Its giving me this error for print(1.2); : error: call of overloaded 'print(double)' is ambiguous Can anyone explain me why? 回答1: 1.2 is a double literal not a float. So the compiler requires an explicit disambiguation. 1.2f would work as that is a float literal. 回答2: 1.2 is a double literal, making the function you're trying to call ambiguous - a double can just as easily be truncated to a float

问题 I have two overloaded function like below: void print(int i) { ... } void print(float f) { ... } Its giving me this error for print(1.2); : error: call of overloaded 'print(double)' is ambiguous Can anyone explain me why? 回答1: 1.2 is a double literal not a float. So the compiler requires an explicit disambiguation. 1.2f would work as that is a float literal. 回答2: 1.2 is a double literal, making the function you're trying to call ambiguous - a double can just as easily be truncated to a float

问题 I'm trying to blend two colors that are coded as integers. Here is my little function: int blend (int a, int b, float ratio) { if (ratio > 1f) { ratio = 1f; } else if (ratio < 0f) { ratio = 0f; } float iRatio = 1.0f - ratio; int aA = (a >> 24 & 0xff); int aR = ((a & 0xff0000) >> 16); int aG = ((a & 0xff00) >> 8); int aB = (a & 0xff); int bA = (b >> 24 & 0xff); int bR = ((b & 0xff0000) >> 16); int bG = ((b & 0xff00) >> 8); int bB = (b & 0xff); int A = ((int)(aA * iRatio) + (int)(bA * ratio));

问题 I'm trying to blend two colors that are coded as integers. Here is my little function: int blend (int a, int b, float ratio) { if (ratio > 1f) { ratio = 1f; } else if (ratio < 0f) { ratio = 0f; } float iRatio = 1.0f - ratio; int aA = (a >> 24 & 0xff); int aR = ((a & 0xff0000) >> 16); int aG = ((a & 0xff00) >> 8); int aB = (a & 0xff); int bA = (b >> 24 & 0xff); int bR = ((b & 0xff0000) >> 16); int bG = ((b & 0xff00) >> 8); int bB = (b & 0xff); int A = ((int)(aA * iRatio) + (int)(bA * ratio));