You need to go from l to m when filling vector L: void merge(vector<int>& a, int l, int m, int r) { vector<int> L; vector<int> R; for (int i = l; i <= m; i++) L.push_back(a[i]); … } Otherwise L contains additional elements outside the range of interest. Then, index k steps off the end … Read more
The compare function shall satisfy the principle of weak ordering. Change the function the following way static bool compareStrings( const overview_table &a_timestamp, const overview_table &b_timestamp ) { return a_timestamp.n_timestamp < b_timestamp.n_timestamp; } solved Segmentation Fault while comparing strings
You use of strtok() is wrong: line = strtok(buffer, NULL); should be line = strtok(NULL, delim); Another mistakes should be fixed similarly. The elements of text_lines are uninitialized: text_lines = malloc(6000 * sizeof(char*)); this allocated 6000 pointers to char, but none of these pointers are initialized. 0 solved where is the pthread segfault happening?
Let me break down a debugging session for you, but in future you better do that yourself. If the problem can be easily reproduced, it is quite trivial to fix it: gdb ./GAME (gdb) r Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7b2d10c in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0 (gdb) bt #0 0x00007ffff7b2d10c in ?? () from … Read more
You did not initialize numItems to zero. As unitialized it can be any number, including e.g. negative ones. Because of this your list is not created, hence pointer first points to NULL. Then the code segfaults in the function deleteList, when it tries to free memory at location NULL. 1 solved Program received signal SIGSEGV, … Read more
It is a nuisance when we have to create an MCVE from fragments of a program. However, it’s doable — it’s a pain, but doable. Here’s my variation on your code. Of the 115 lines shown, 35 are what you wrote in the question — roughly. So, I had to create twice as much code … Read more
Try this: #include <stdio.h> #include <stdlib.h> #include <string.h> FILE *fr; int main (int argc, const char * argv[]){ char line[1024]; double uppercase = 0, lowercase = 0; int x = 0; fr = fopen (“PercenUpLow.txt”, “rt”); if (fr == NULL) { printf (“Can’t open file”) ; return EXIT_FAILURE ; } while(fgets(line, 1024, fr) != NULL) … Read more
Look at your loop here: for(int i=0; i<3*n; i++) { all[j].h = b[i].h; all[j].w = min(b[i].w,b[i].l); all[j].l = max(b[i].w, b[i].l); j++; // increment all[j].h = b[i].l; all[j].w = min(b[i].w,b[i].h); all[j].l = max(b[i].w, b[i].h); j++; // increment again all[j].h = b[i].w; all[j].w = min(b[i].l,b[i].h); all[j].l = max(b[i].l, b[i].h); j++; // increment once again } Look at … Read more
This seems to be a MinGW compiler bug since when using MSVC in Visual Studio to compile the code, the same exception does not occur either. 4 solved std::ifstream crashes in release build on Windows with exit code 0xC0000409: Unknown software exception
You should build your code with -Wall flag to compiler. At compile time it will then print: main.c:9:15: warning: ‘coord1’ is used uninitialized in this function [-Wuninitialized] This points you to the problem. coord1 is a pointer type, that you assign to, but coord1 has no memory backing it until it is initialized. In the … Read more
Using feof() is a bad idea as it can return zero, and then the next line of input can encounter end of the file – which can give unexpected errors Also fgets() returns NULL if an error occurs, including encountering end of file. Imagine your loop has been going along happily, and has just read … Read more
As sjsam pointed out, this statement is wrong: arr=(int **) malloc(sizeof(int )*n); Your program works on systems where sizeof(int) == sizeof(int*) (i.e. 32-bit systems), but will likely fail on 64-bit ones (on which sizeof(int) == 4 and sizeof(int*) == 8. i want to create a 2d array dynamically of dimension n by q We understand … Read more
That’s why there are debug tools like gdb (just google for it 😉 ). This is the backtrace: #0 0x00000000004009ba in node::setnext (this=0x0, x=0x614cc0) at a.cpp:25 #1 0x0000000000400c18 in list::insertend (this=0x7fffffffdf10, x=45) at a.cpp:109 #2 0x00000000004008df in main () at a.cpp:137 that means in line 137 there is a function call (l.insertend(45)), then in line … Read more
This code seems to contain many errors, but the most evident to me is while((ch!='”‘) || (ch!=’>’)) /*until we get the end of header name*/ I would say that every character is either different from ‘”‘ or from ‘>’ … or do you know a character that can be equal to both? 😉 5 solved … Read more
WHere does your string point to? Nowhere! That’s why you have segmentation fault. You have to either allocate variable on stack as array or define it as pointer and later allocate memory using malloc. When using malloc, don’t forget to include “stdlib.h” Either do this: char str[6]; strcpy(str,”C-DAC”); or char *str=malloc(sizeof(*str) * 6); strcpy(str,”C-DAC”); solved … Read more