You can do this directly in SQL. Use distinct to get only records that are no duplicates SELECT DISTINCT a.NAME FROM your_table a WHERE a.NAME = ‘JOHN SMITH’ or use top to get only a certain amount or records as result SELECT top 1 a.NAME FROM your_table a WHERE a.NAME = ‘JOHN SMITH’ 1 solved … Read more
CHAR_BIT is something like #define CHAR_BIT 8 As such, you are printing the size of an int, which is 4 bytes for you. I think you wanted printf( “%d\n”, CHAR_BIT ); solved Wondering why the size of my char is 4 bits?
Welcome to C! You have allocated no memory so you error. Use malloc to allocate the memory. I have made this code that works for you: void f(char*s,char*toString) { char c,i=0,j=0; int num=0; while(c=*(s++)) { toString[num]=c; // putchar(c); if(c==’ ‘)++i; if((j<4&&i==7)||(j>=4&&i==6)) { i=0; ++j; toString[num]=’\n’; // putchar(‘\n’); } num++; } } state_t initial_user_state_to_c(char * string) … Read more
If i equals 0, then you can’t look words[i-1] because you can’t do words[-1] Furthermore, when you use || operator, if the first expression is true, the second expression is not checked With i == 0 || words[i – 1] != words[i] you can print your first words because i equals 0 and the expression … Read more
Just call truncate or ftruncate to cut the file to zero bytes. Then write the line you want. You don’t need to close or re-open the file, you can use your existing handle. 2 solved C system calls, delete the file
As you’ve noticed, if you follow this path you’ll end up with some really unwieldy names. Naming is largely up to preference (for personal or new projects) or convention (for existing projects). If you want to go learn a convention, read some code that you might want to contribute to. Most importantly, though, be consistent … Read more
if you want to split it in a list of strings then you can use String.Split function. string[] splitted = str.Split(‘,’); solved How to use Substring function in C# [duplicate]
var lstPnts = new List<PointF>(); lstPnts.Add(new PointF(23.92f, 6)); lstPnts.Add(new PointF(23.88f, 0)); lstPnts.Add(new PointF(0, 0)); lstPnts.Add(new PointF(0, 6)); var avgPoint = new PointF(lstPnts.Average(t=>t.X),lstPnts.Average(t=>t.Y)); var ordered = lstPnts.OrderBy(t => Math.Atan2(avgPoint.Y – t.Y, avgPoint.X – t.X)).ToArray(); We found an average point. Then we calculated the angle between mid point and the other points and sorted our array with … Read more
Now, the question states that at most 2 out of A, B, C are non-positive. So, it means that condition that includes the 3 numbers and returns true would be 1. !(A =< 0 && B =< 0 && C <= 0) Here, we know that either one of A, B or C is greater … Read more
Single() already throws an InvalidOperationException if the result contains more than one element (or if it is empty). You were probably confusing it with First(), which doesn’t throw if there is more than one element. 2 solved Is there a stricter version of .Single()? [closed]
You already used the two important words that are key to undestand why what you intend is not possible, but you probably haven’t grasped their full meaning: Statement and expression. The if statement (like all statements) does not yield a value, while the ?: operator is an expression that does yield a value. Distinguishing between … Read more
In nonblocking operation, you typically have a point in the program where it waits for any of the nonblocking file descriptors to report availability of data. In the example you linked, that’s the select(…) line. In practice, you either have such a central select yourself, or have the main loop run by another library to … Read more
First of all, your code. It’s ugly. Please use more whitespace and commenting. It takes a while to figure out what certain variables represent. With that in mind I think you need to separate your for and while loops that are inside your for(j = 0; j < m; j++) loop. The while loop should … Read more
Couldn’t you just do this?: variable = 12; //Instead of putting int variable before this? No you can’t do this because you must declare it’s type first. This int variable; defines a variable that can hold an int. If you assign a string, “asdsa2”, or a float, 34.5, you will get a compilation error. Because … Read more
The solution is : for n=1: = 1 for n=2: = 1+2 => 1+2+3 => 1-2+3 for n=3: = 1+2 for n=4: = 1+2+3 => -1+2+3 for n=5: = 1+2+3 => 1+2+3+4-5 for n=6: = 1+2+3 for n=7: = 1+2+3+4=>1+2+3+4+5=>1+2+3-4+5 for any n, first calculate the S(k)=1+2+3+…+k where S(k)>n and x=S(k)-n is an even number. … Read more