overflow

问题 I'm using position: absolute and position: relative to display text over an image if its parent is hovered over. The container that the text and images parent div is in is set to overflow-x: auto , causing it to have a horizontal scrollbar. I want the text that appears to vertically overflow the #container element (and the horizontal scrollbar), but this is not happening - instead, a vertical scrollbar is appearing in the container. I do not want the containers height to expand to the height

问题 This question already has answers here : Access array beyond the limit in C and C++ [duplicate] (7 answers) Closed 6 years ago . int main() { int *p=NULL; p=malloc(8); if (p==NULL) printf("Mem alloc failed\n"); else printf("Passed\n"); unsigned long int i=0; for (i=2;i<=10000;i++) p[i]=10; // I thought as we are increasing beyond malloc size of 8 bytes there should be segmentation fault but I was wrong. printf("p[10000]= %d %d\n",p[10000]); free(p); return 0; } What can be the reason behind

问题 This question already has answers here : Access array beyond the limit in C and C++ [duplicate] (7 answers) Closed 6 years ago . int main() { int *p=NULL; p=malloc(8); if (p==NULL) printf("Mem alloc failed\n"); else printf("Passed\n"); unsigned long int i=0; for (i=2;i<=10000;i++) p[i]=10; // I thought as we are increasing beyond malloc size of 8 bytes there should be segmentation fault but I was wrong. printf("p[10000]= %d %d\n",p[10000]); free(p); return 0; } What can be the reason behind

问题 I'm trying to use only AND OR XOR and NOT to determine whether adding 2 binary number made of 4 bits will overflow. I know, for example, that something like 1100 + 0100 will wind up as 1 | 0000. But how can I find this using just these logical operators? I'm trying to get 1000 when overflow happens, and 0000 when it doesn't. This is easy enough since I can just use XOR with a mask to clear the last 3 bits. Does anyone have suggestions for figuring this out? 回答1: Numbers are ABCD and EFGH, ^

问题 I am solving a programming problem which is stuck at calculating nCr efficiently and at the same time avoiding overflows. I have made the following trivial simplification but am just curious about if there are any more sophisticated simplifications available out there. (n)!/(n-k)!*k! = n*(n-1)*.....*(max(n-k+1, k))/(min(n-k, k-1)) Can there be any more simplification possible considering different cases for k as even or odd, just suggesting a way. Any comment is appreciated. 回答1: I found an

问题 I am solving a programming problem which is stuck at calculating nCr efficiently and at the same time avoiding overflows. I have made the following trivial simplification but am just curious about if there are any more sophisticated simplifications available out there. (n)!/(n-k)!*k! = n*(n-1)*.....*(max(n-k+1, k))/(min(n-k, k-1)) Can there be any more simplification possible considering different cases for k as even or odd, just suggesting a way. Any comment is appreciated. 回答1: I found an

问题 This is my code with int j : void solve(){ unsigned long long n; cin>>n; unsigned long long sum = 0; int j = 1; for(int i=3;i<n+1;i+=2){ sum += ((4*i)-4)*(j); j++; } cout<<sum<<"\n"; } Input: 499993 Output: 6229295798864 but it is giving wrong output, and here is my code with long long j which is working fine: void solve(){ int n; cin>>n; unsigned long long sum = 0; long long j = 1; for(int i=3;i<n+1;i+=2){ sum += ((4*i)-4)*(j); j++; } cout<<sum<<"\n"; } Input: 499993 Output:

问题 This is my code with int j : void solve(){ unsigned long long n; cin>>n; unsigned long long sum = 0; int j = 1; for(int i=3;i<n+1;i+=2){ sum += ((4*i)-4)*(j); j++; } cout<<sum<<"\n"; } Input: 499993 Output: 6229295798864 but it is giving wrong output, and here is my code with long long j which is working fine: void solve(){ int n; cin>>n; unsigned long long sum = 0; long long j = 1; for(int i=3;i<n+1;i+=2){ sum += ((4*i)-4)*(j); j++; } cout<<sum<<"\n"; } Input: 499993 Output:

问题 I am working on this project where I am using drop down menus in tableView cells. I am using the following code to make the drop down part overflow the tableView cells bottoms cell.clipsToBounds=false cell.contentView.clipsToBounds=false Everything works fine, but when I scroll down the tableView till the drop down part is not visible anymore, the overflow stops working. You can see the problem in action in the project below https://github.com/Rawchris/Drop-down-overflow2 In the project I

问题 I am working on this project where I am using drop down menus in tableView cells. I am using the following code to make the drop down part overflow the tableView cells bottoms cell.clipsToBounds=false cell.contentView.clipsToBounds=false Everything works fine, but when I scroll down the tableView till the drop down part is not visible anymore, the overflow stops working. You can see the problem in action in the project below https://github.com/Rawchris/Drop-down-overflow2 In the project I