[ad_1] I recently saw the nice answer of Kerrek for a similar problem in SO: Read file line by line with an additional comment for the separator trick. So, I looked for this and transformed it to your standard input requirement (which was actually easy and less effort): #include <iostream> struct Date { int day, … Read more
[ad_1] What is precision? It refers to how closely a binary floating point representation can represent a real value. Real values have infinite precision and infinite range. Digital values have finite range and precision. In practice a single-precision IEEE-754 can represent real values of a precision of 6 significant figures (decimal), while double-precision is good … Read more
[ad_1] When you do cin >> divers; the end-of-line character is not removed from the input, just the number leading up to it. Then, the next time you ask for a line with std::getline() it returns just the end-of-line character that is already there and does not wait for your new input. So when you … Read more
[ad_1] I want to reset the value of the char[] newer everytime my new function is called. All you need is to initialise it properly: char newer[45] = “”; As a general rule, you should always initialise local variable before using it. Failing to do so will usually lead to unexpected behaviour as you’ve seen … Read more
[ad_1] This creates a child process which has a copy of the parent’s heap, stack and data space. You need to #include <unistd.h>. You could use this when you want a process to duplicate itself so that the parent and child can each execute different sections of code at the same time. [ad_2] solved will … Read more
[ad_1] This method works: public static IList<DateTime> GetWeekDays(DateTime startDate, DayOfWeek day, int count, bool pastDays, bool includeStartDate) { int start = (int)startDate.DayOfWeek; int desired = (int)day; int offset; int diff = Math.Abs(start – desired); if(!includeStartDate && start == desired) diff = 7; offset = pastDays ? (-1) * (7- diff) : diff; int weekDays = … Read more
[ad_1] The following code will read all ints from standard input, skipping space and newline. while(1) { int ch = getc(stdin); if(ch == EOF) break; if(ch == ‘\n’) { printf(“NewLine ……\n”); } ungetc(ch, stdin); int x; if(scanf(“%d”, &x) == EOF) break; printf(“READ:%d:\n”, x); } 5 [ad_2] solved how i read new line in integer type … Read more
[ad_1] Well, comparing your methods, it became obvious your final operation for calculating pi was incorrect. Replace pi = (val + x) * (four/(long double)n); with these two lines: val = val * (long double)2.0; pi = (val + x) * ((long double)2.0/(long double)n); Compiling and running gives: 3.14159265241 Which I believe is the output … Read more
[ad_1] You want to do two things in single shot: Get the integer value if first digit after decimal is 0 Get the rounded value upto last 2 digits if its first digit after decimal is not 0. For second option you can use: newValue = Math.Round(value, 2) Now comes the first requirement: Once you … Read more
[ad_1] Here’s a simple example using the Reflection approach: private void button1_Click(object sender, EventArgs e) { Form f2 = TryGetFormByName(“Form2”); if (f2 != null) { f2.Show(); } } public Form TryGetFormByName(string formName) { var formType = System.Reflection.Assembly.GetExecutingAssembly().GetTypes() .Where(T => (T.BaseType == typeof(Form)) && (T.Name == formName)) .FirstOrDefault(); return formType == null ? null : (Form)Activator.CreateInstance(formType); … Read more
[ad_1] You should read time(7). Be aware that even written in assembler, your program will be rescheduled at arbitrary moments (perhaps a context switch every millisecond; look also into /proc/interrupts and see proc(5)). Then any hardware timer is meaningless. Even using the RDTSC x86-64 machine instruction to read the hardware timestamp counter is useless (since … Read more
[ad_1] Check http://en.cppreference.com/w/cpp/language/eval_order especially the part which discusses “Undefined behavior”. Basically it’s not a bug in the compiler. The language says what you’re doing is undefined. [ad_2] solved Compiler issue or some bug in code block of c [duplicate]
[ad_1] QSettings().setValue( DEST_FOLDER, destDir ); will give you a default constructed temporary instance of QSettings that will exist until the end of the full expression, in this case the ; at the end of the line, and then call setValue(…) on said temporary. You can call every constructor you want this way, not just the … Read more
[ad_1] As keys in std::map are const your operator< method must be const as well: bool operator<(const RJNodeAddress &l) const // ^ here it should be const anyway as it does not modify the object but in this case missing it leads to compilation errors. [ad_2] solved Creating std::map with a structure as its key … Read more
[ad_1] You’re getting this warning because there are code paths where key is not set and subsequently used. The isupper and islower functions are not opposites, e.g. a false return value from one doesn’t imply a true return value from the other. For example, c contains the character ‘0’, both isupper and islower will return … Read more