When N > 100, h is accessed to an index greater than 100, inside the nested for loop h[k][i][j]=100; but h is defined as double h[2][100][100]; You are going out of bounds for h If you want N as greater than 100 you need to redefine h or malloc it. 1 solved Program working fine … Read more
Here is one issue: void WaveTableManager::insert(WaveTable * WT,int position) { if (wtvector.size()<=position) wtvector.resize(position); wtvector[position]=WT; // < — Out of bounds access } When you call resize(), the upper bound is vector::size()-1. Since position is the new size of the vector, what you probably want is this: wtvector[position – 1] = WT; 5 solved can not … Read more
Inside merge() the assignment of i,j,k i = 0; j = middle; k = 0; while (i!=n1 || j!=n2) { … should be changed to this i = 0; j = 0; k = p; while (i!=n1 && j!=n2) {… 1 solved Segmentation fault in merge sort program
You’ve tagged this as c++ but it seems like you’re using entirely c.. So I’ll answer this as if it’s c. A segmentation fault occurs when you access memory that you don’t own. In this case you’re trying to print a character outside of the bounds of your string. (e.g. your string is len characters … Read more
In C++, using malloc the way you are using it is undefined behavior, as it does not perform object initialization, which means that it’s not calling the vector’s constructor (but there are other things that are not done, as initializing the vtable if there was one, for example). In your example, you should use new: … Read more
Valgrind says that the illegal write is occurring at Address 0x6172676f72502074. If you look at that address as ASCII characters, it’s: argorP t, or converting from little endian: t Progra. This looks like part of one of your menu items, “9. Abort Program”. Maybe the bug is that menu_init() is writing past the end of … Read more
Start allocating memory from index 0 onwards, since indexing in C/C++ is from 0 and not 1. for (int i = 0; i < 5; i++) Also, replace i by i – 1 in all number[i][j] above. Like number[1][1] = 1. by number[0][1] = 1. and so on. And also, don’t use malloc (and don’t … Read more
This causes undefined behaviour. strcpy may only be used between areas that do not overlap. To fix this code you could write: memmove(m+1, m, strlen(m) + 1); solved Unpredictable behavior for strcpy(m+1,m)
sizeof gives you the number of bytes the array occupies, not the number of elements it consists of. So as a double requires 8 bytes on your system, the result should become clear. solved Reading garbage instead of segfault for non-existant memory locations
Here’s a step-by-step breakdown of what your code is doing: int *a; int *b; This declares two pointers to int named a and b. It does not initialize them. That means that their values are unspecified, and you should expect them to be complete garbage. You can think of them as “wild” pointers at this … Read more
This is kind of naughty: int main(int argc, char**argv) { argv++; int n = argc – 1; int arr[n]; for(int i = 0; i < n; i++) { arr[i] = atoi(argv[i + 1]); } printf(“%d\n”, degreeOfArray(arr, n)); } Argc is 4. You increment argv (which is naughty). n is 3. arr has values [0] through … Read more
I would think you would need to add check on your externally accepted values (using assert might be a start) Like : checking tm>0 ler>0 C[i]<tm A[i]!=NULL B[i]!=NULL As mentionned in the comment it an off by one issue : in LER the values should be from 0 to tm-1 or use B[i][j]=C[k]-1; at line … Read more
For the 2nd loop, I believe it should be for(j=0;j<t.size();j++) Also, i=s[x] Should probably check that x is with the bounds of indexes for s. 3 solved Segmentation fault while using vector in C++?
If you are saying that list->at(0) returns NULL Then the pointer pEnd will be NULL. Therefore doing this *pEnd is de-referencing a NULL pointer which will obviously seg fault. If you want to chek for this, you could check the pointer before de-referencing. for eg: if(pEnd == NULL) //Do nothing or throw error or something … Read more
You have to allocate memory for structure and it’s member and then after you can do copy data in it. A *a = malloc(sizeof(A)); a->name=malloc(100); //change the size other then 100 what ever you want. solved Segmentation fault while copying string to a char array using memcpy