So in your case there's six possible outcomes depending on what gets executed first. 1 1 3 if a then a++ then ++a 1 2 2 if a then ++a then a++ 1 2 3 if a++ then a then ++a And so on

i got 1 2 2 when compiled instead of 1 2 3, compiler warned about some assignation issue, i assume ++a doesnt take effect like that in printf

So in your case there's six possible outcomes depending on what gets executed first. 1 1 3 if a then a++ then ++a 1 2 2 if a then ++a then a++ 1 2 3 if a++ then a then ++a And so on

So in your case there's six possible outcomes depending on what gets executed first. 1 1 3 if a then a++ then ++a 1 2 2 if a then ++a then a++ 1 2 3 if a++ then a then ++a And so on

The problem is the interleaving of instructions. Consider ++a as an expression, it is often broken up into two instructions temp = a + 1 // evaluate the expression a = temp // move the value to the variable Before C++11, for: fun(++a, ++a); You could have compiler interleave (reorder them) the instructions like this temp1 = a + 1 // value component temp2 = a + 1 // value component a = temp2 // side effect a = temp1 // side effect ... execution of fun(temp1, temp1) After C++11, more robust sequencing of operations for prefix and postfix operarions was introduced. In this case the value component would be sequenced before the side effect but that doesn't solvs the above interleaving problem as you can see for our particular case of what compiler can output After C++17 they are indeterminately sequenced, that is each ++a expression will finish first then the second so temp1 = a + 1 a = temp1 temp2 = a + 1 a = temp2 ... execution of fun(temp1, temp1+temp2) or temp2 = a + 1 a = temp2 temp1 = a + 1 a = temp1 ... execution of fun(temp2, temp1+temp2) can happen. Which makes it implementation defined unspecified behaviour.

It is not implementation defined behavior. An implementation is not required to document the order of evaluation of arguments even if it follows any such order (no implementation that I am aware of follows such an order because there is so much room here for optimisation). It is Unspecified Behavior.

Hi guys , is it possible to print into console from left to right ? (with C)

ah sorry from right to left

there we go do you mean actually print from right to left or maybe just " *"?

We are given two strings P and Q, each consisting of N lowercase English letters. For each position in the strings, we have to choose one letter from either P or Q, in order to construct a new string S, such that the number of distinct letters in S is minimal. Our task is to find the number of distinct letters in the resulting string S. For example, if P = "ca" and Q = "ab", S can be equal to: "ca", "cb", "aa" or "ab". String "aa" has only one distinct letter ('a'), so the answer is 1 (which is minimal among those strings). Write a function: int solution(char *P, char *Q); that, given two strings P and Q, both of length N, returns the minimum number of distinct letters of a string S, that can be constructed from P and Q as described above. Examples: 1. Given P = "abc", Q = "bcd", your function should return 2. All possible strings S that can be constructed are: "abc", "abd", "acc", "acd", "bbc", "bbd", "bcc", "bcd". The minimum number of distinct letters is 2, which be obtained by constructing the following strings: "acc", "bbc", "bbd", "bcc". 2. Given P = "axxz", Q = "yzwy", your function should return 2. String S must consist of at least two distinct letters in this case. We can construct S = "yxxy", where the number of distinct letters is equal to 2, and this is the only optimal solution. 3. Given P = "bacad", Q = "abada", your function should return 1. We can choose the letter 'a' in each position, so S can be equal to "aaaaa". 4. Given P = "amz", Q = "amz", your function should return 3. The input strings are identical, so the only possible S that can be constructed is "amz", and its number of distinct letters is 3. Write an efficient algorithm for the following assumptions: N is an integer within the range [1..200,000]; strings P and Q are both of length N; strings P and Q are made only of lowercase letters (a−z); strings P and Q contain a total of at most 20 distinct letters. How to solve this code ?

Uhh there's too much jargoan with explanations here and none touching the actual problem of interleaved instructions which are largely the root cause of the UB in this case.

I have explained Undefined Behavior, Implementation Defined Behavior and Unspecified Behavior in great detail in the Resources section. Previously we used to point out to that but now we just expect them to search for it in the Resources section

Well I didn't see the why being explained anywhere which irked me a bit. Not that i did any better job at explaning :D. Could have talked about sequence point for pre C++11 behaviout but ah well. Terms like side effect and value computations are already difficult for beginners imo. I feel it makes much more sense in showing the range of ambiguity of translations that can happen by taking a hypothetical case (or two, which can happen) for a better understanding.

Best project for beginners in c++

Is there anything like this for JAVA??

Hello guys, Can anyone please help to solve this problem in O(N) time complexity? Problem Statement You are given an array(Arr) of N Distinct integers. You have to find the sum of minimum element of all the subarrays (continous) in that array. See Sample for better understanding. Input The first line of input contains N, the size of the array The second line of input contains N space-separated integers Constraints 2 ≤ N ≤ 100000 1 ≤ Arr[i] ≤ 1000000000 Output The output should contain single integers, the sum of minimum element of all the subarrays in that array. Example Sample Input 3 1 2 3 Sample Output 10 Explaination all subarrays [1] [1,2] [1,2,3] [2] [2,3] [3] Sum of minimums : 1 + 1 + 1 + 2 + 2 + 3 = 10

If the array is sorted then it is int Sum=0; int n= sizeof(A)/sizeof(A[0]); for(int i=0;i<n;i++) Sum+=A[i]*(n-i);

Array is not sorted

Hello guys, Can anyone please help to solve this problem in O(N) time complexity? Problem Statement You are given an array(Arr) of N Distinct integers. You have to find the sum of minimum element of all the subarrays (continous) in that array. See Sample for better understanding. Input The first line of input contains N, the size of the array The second line of input contains N space-separated integers Constraints 2 ≤ N ≤ 100000 1 ≤ Arr[i] ≤ 1000000000 Output The output should contain single integers, the sum of minimum element of all the subarrays in that array. Example Sample Input 3 1 2 3 Sample Output 10 Explaination all subarrays [1] [1,2] [1,2,3] [2] [2,3] [3] Sum of minimums : 1 + 1 + 1 + 2 + 2 + 3 = 10

So we start off considering each element of the array as a minimum for some subarray.Now to find the length of a subarray such that arr[i] is minimum you have find previous smaller and next smaller .So now you get a subarray whose minimum would be arr[i] now try little maths and you would be able to calculate number of subarrays that has minimum as arr[i].

https://pastecode.io/s/it8ggsjj can anyone help me correct this code? its to find kth smallest element using heap

Can you specify what exact problem you have with the code? Compilation error, crash, logic error, etc?

https://pastecode.io/s/it8ggsjj can anyone help me correct this code? its to find kth smallest element using heap

Can someone tell me what "streams" means when we talk about input and output?

It is just an abstraction that also conveys that input and output are sequential in nature. The abstraction also ensures that programmers don't need to be concerned about where the input/output is happening from. Streams are an abstraction of top of files which itself is an abstraction layer. Files offer the notion of a sequence of bytes while streams offer formatted input/output operations on top of it.

And can you explain to me what *FILE and (stdin) have to do with all this, they are the things that confuse me the most.

And can you explain to me what *FILE and (stdin) have to do with all this, they are the things that confuse me the most.

Please i want to get this output "20220294719" As my output is it possible. The code was error. Can anyone guide. Write your matric number using C language.

compilation infoprog.c: In function ‘getinput’: prog.c:4:8: warning: missing terminating " character printf("what is your matriculation number? ^ prog.c:4:8: error: missing terminating " character printf("what is your matriculation number? ^~~ prog.c:5:32: warning: missing terminating " character scanf("%d"&matriculation_number"); ^ prog.c:5:32: error: missing terminating " character scanf("%d"&matriculation_number"); ^ prog.c:5:11: error: invalid operands to binary & (have ‘char *’ and ‘int’) scanf("%d"&matriculation_number"); ^ prog.c:5:32: error: expected ‘)’ before ‘printf’ scanf("%d"&matriculation_number"); ^ ) printf("My matriculation number is %d", matriculation_number); ~~~~ prog.c:6:63: error: expected ‘)’ before ‘}’ token printf("My matriculation number is %d", matriculation_number); ^ ) } ~ prog.c:6:63: error: expected ‘;’ before ‘}’ token printf("My matriculation number is %d", matriculation_number); ^ ; } ~  stdout

#include <stdio.h> void getinput() { int matriculation_number; printf("what is your matriculation number?'; scanf("%d"&matriculation_number); printf("My matriculation number is %d", matriculation_number); }

#include <stdio.h> void getinput() { int matriculation_number; printf("what is your matriculation number?'; scanf("%d"&matriculation_number); printf("My matriculation number is %d", matriculation_number); }

error on line printf("what is your matriculation number?';

I have a low understanding. What is meant to be code there?

I have a low understanding. What is meant to be code there?

you end the string with different character ' vs " the scanf is missing a parameter delimiter ,

Can u correct that. It was 1st class 1st assignment

sorry, but i don't take "it was my assignment" as a valid request

you end the string with different character ' vs " the scanf is missing a parameter delimiter ,

you end the string with different character ' vs " the scanf is missing a parameter delimiter ,

The scanf, or scanf("%d"&matriculation_number),; ??

?? that's not correct

#include <stdio.h> void getinput() { int matriculation_number; printf("what is your matriculation number?”); scanf("%d",&matriculation_number); printf("My matriculation number is %d", matriculation_number); }

What's the correct code

i would advice you to retake the lesson

#include <stdio.h> void getinput() { int matriculation_number; printf("what is your matriculation number?”); scanf("%d",&matriculation_number); printf("My matriculation number is %d", matriculation_number); }

#include <stdio.h> void getinput() { int matriculation_number; printf("what is your matriculation number?”); scanf("%d",&matriculation_number); printf("My matriculation number is %d", matriculation_number); }

https://pastecode.io/s/it8ggsjj can anyone help me correct this code? its to find kth smallest element using heap

compilation infoprog.c: In function ‘getinput’: prog.c:4:8: warning: missing terminating " character printf("what is your matriculation number?”); ^ prog.c:4:8: error: missing terminating " character printf("what is your matriculation number?”); ^~~~~~~~~~ prog.c:5:34: error: expected ‘)’ before ‘;’ token scanf("%d",&matriculation_number); ^ ) prog.c:5:1: warning: passing argument 1 of ‘printf’ makes pointer from integer without a cast [-Wint-conversion] scanf("%d",&matriculation_number); ^~~~~~~ In file included from /usr/include/stdio.h:867, from prog.c:1: /usr/include/x86_64-linux-gnu/bits/stdio2.h:105:32: note: expected ‘const char * restrict’ but argument is of type ‘int’ printf (const char *restrict fmt, ...) ~~~~~^~~ prog.c:7:1: warning: format not a string literal and no format arguments [-Wformat-security] } ^ prog.c:6:63: error: expected ‘;’ before ‘}’ token printf("My matriculation number is %d", matriculation_number);

No 1 is taking us, the lecturer just give us notes (theory aspect) told us to do the rest as assignment 🤦‍♂️

Hello, how do I print coordinates (x,y) in the cartesian plane in the console? I have an exercise that asks to print the coordinates on the plane.

then how do i correct that?