Code char a; a = 0xf1; printf("%x\n", a); Output fffffff1 printf() show 4 bytes, that exactly we have one byte in a. What is the reason of this misbehavior? How can I correct it? You need to sign in to view this answers

If I have two GPS locations, say 51.507222, -0.1275 and 48.856667, 2.350833, what formula could I use to calculate the distance between the two? I’ve heard a lot about a haversine formula, but can’t find any information about it, or how to apply it to C. I’ve written the following code, however, it’s very innacurate.

here is very simplified code of problem I have: enum node_type { t_int, t_double }; struct int_node { int value; }; struct double_node { double value; }; struct node { enum node_type type; union { struct int_node int_n; struct double_node double_n; }; }; int main(void) { struct int_node i; i.value = 10; struct node n;

I made a small C calculator earlier today, and I noticed it worked fine when the only operation it was able to do was addition, however when I tried to add subtraction, multiplication or division, it would simply not give an output, and I don’t know the reason for it as another calculator I had

I have two structs struct A and struct B with the same memory layout, and I want to cast a return value of type struct A to type struct B, for example, in C++, I can achieve this goal in single line (without any temporary variable) like this: #include <utility> struct Temp { int a;

#include <stdio.h> #include <stdlib.h> #include <math.h> void pivot(double **matrix, int n, int row) { double maxElement = fabs(matrix[row][row]); int maxRow = row; for (int i = row + 1; i < n; i++) { if (fabs(matrix[i][row]) > maxElement) { maxElement = fabs(matrix[i][row]); maxRow = i; } } if (maxRow != row) { double *temp =

I am writing a program to solve Sokoban levels – because why not. The initial trigger for writing the program was to show a colleague how a program can be written using the MVC pattern. From there, it evolved. The good: for some warehouses, the solver finds the proper solutions. I know because I created

trying to write a perfect number algorithm but can’t get right output even thought 28 is a perfect number. #include <stdio.h> int main() { int x = 0; int sum; printf("enter a number: "); scanf("%d", &x); for(int i = 1;i < x;i++) { if(x % i==0) { printf("%d ", i); sum = sum + i;

I only have access to ‘C’ and need to replace characters within a character array. I have not come up with any clean solutions for this relatively simple procedure. I pass in a character array, for example: char strBuffer[] = "/html/scorm12/course/course_index.jsp?user_id=100000232&amp;course_id=100000879&amp;course_prefix=ACQ&amp;version=2&amp;scorm_version=3&amp;roster_id=100011365&amp;course_name=Test%20Course%201.2&amp;mode=browse&amp;course_number=0000&amp;mode_id=1"; I need to modify this buffer to replace all the &amp; with &. The

I’m not very familiar with the internal details of ARM processors, but I do not understand the following behaviour on my Nvidia Jetson Nano dev board. C code sample … //main.c #include <stdio.h> int main() { int fred = 123; int i; for(i = -10 ; i <= 10 ; i++) printf("%d / %d ==