19,876 Topics
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 | I would like to make a memory allocation: `(*matrix)[i]=(int*)malloc(sizeof(int)*sz);` But I have got an error message: Invalid operands to binary * What should be the problem? |
| | if I write the following code.. float a =1.3; double b=1.3; if(a>b) printf("hii"); else printf("hello"); the o/p comes hii...but if I change the values to 1.7 the output comes hello...can any1 explain the reason????if precision is to be taken into account then everytime double should be greater..  |
| | actually , I am solving a problem: A list is there in which infinite numbers(approx 1 lakh) are there, and i am reading one by one. At any point of time, I am asked to return the kth(it is given initally) minimum element from the elements read so far. my …  |
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 | Hello Im posting this in C because Arena is highly influenced by C.... Im trying to open a file using fopen but I cant get it to work. Ive made the permissions on the file 777 (all) just in case but it doesnt work. Can someone please test that it …  |
| | Hello I want to run a command as sudo (to be especific open a file) but I dont want to run the entire program as sudo obviously. How do i do a fopen with sudo previlges? I dont mind hardcoding the password (eg, so it wont ask me for my …  |
| | whenever i try to run my program it always has this error "In function mainrift" "syntax error at the end input" can someone help me. void mainrift() { int days = 1, choice = 0, gil = 20000, debt = 50000; int depgil = 0, phoenixdown1 = 0, elixiressence1 = …  |
| | i am using strrev function and also included the header file string.h but i am getting the compile error **‘strrev’ was not declared in this scope**. what else is required? |
 | I am trying to create a program that converts a fahrenheit number to a celsius number, and convert a celsius number to a fahrenheit number. It takes user input and decides which sub-program to run depending on which letter is entered. Once it decides this, it asks for the number …  |
| | I am currently in school for video game design. I plann to make a mmorpg and although I will be creating the company I plann to do much of the work involved. I have noticed lots of mmorpgs have bots running non stop flooding the game and making gameplay annoying … |
| | Good day ma'am/sir, i just wanna ask how to add color in a just specific word? because i tried this one printf("You chose"); textcolor(RED); printf("RED"); but still the whole output is colored red. please help, THANKS! |
| | This program displays decimal,hexadecimal & character equivalents int main(void) { int i = 0; for(i = 0; i < 255; i++) printf("Dec-%3d hex-%02x Char-%c\n", i, i, i); return 0; }  |
| | How can I find the differences between two matrix? I should find the diverse numbers. Thanks in advance for your help! |
| | File program which gives output induntation code when we call that file actualy it was uninduntationed before |
 | I have a little problem related to the white spaces in my program. Well, the actual program I'm trying to make is something else. so this program is just to check whether the text is properly broken or not. The problem I'm facing is, for the first word in my … |
| | i have to read a verilog file in c ..how will be the code in general? |
| | main() { char s[19]; strcpy(s,"\0"); if(s==NULL) printf("daniweb\n"); else printf("nitin\n"); return 0; } Can anyone tell me what is expected o/p of this and why ? help! thanks in advance. |
| | hello, this is code to generate fibo numbers in log n time. it is giving o/p as "0", i dn't know where is error. please help. #include<stdio.h> int (*(fibo)(int m[][2],int p))[2] { int r[2][2]={0,0,0,0},d[2][2]={0,0,0,0}; int (*l)[2]; int i,j,k; if(p==1) return m; l=fibo(m,p/2); for(i=0;i<2;i++) for(j=0;j<2;j++) { r[i][j]=*((*l+i)+j); } for(i=0;i<2;i++) for(j=0;j<2;j++) for(k=0;k<2;k++) … |
| | Hello guys ! Hope you're doing well. I have faced a problem in declaring linked lists inside a linked list. I made a picture because it speaks more than 1000 words  Here's my structure declaration: typedef struct author *link; struct author { char name[20]; link next; link down; … |
| | Hi, I'm writing a small C program to clean the radius radacct table, removing ended sessions records and inserting on a separated database. The problem is that MySQL C API doesn't have an easy way to insert the result of a query on another database/table directly, you have to build … |
| | Hi. Can you help me read a two digit like "12" from an input.txt file, is it advisable to use fscanf or fgets? This is a sample of the txt file : a(1,4,3,12,15) Thanks :) |
| | #include <stdio.h> #include <stdlib.h> #include<string.h> char combine(char [],int k,int n); int main() { char str[10]; int m,n; printf("enter the string: "); fgets(str,sizeof(str),stdin); m=0; n=strlen(str); printf("the combinations are....\n"); combine(str,m,n-1); return 0; } char combine(char a[],int k,int n) { int i; char temp[40],t; strcpy(temp,a); if(k==n) { printf("%s\t",a); } else{ for(i=k;i<=n;i++) { t=a[k]; …  |
| | I have written some code that stores values inside a array of arrays. I am releasing the memory in my release method but Valgrind still reports the following: ==640== ==640== HEAP SUMMARY: ==640== in use at exit: 6,094 bytes in 33 blocks ==640== total heap usage: 12,040 allocs, 12,007 frees, … |
| | Hi guys, I'm having a weird error that I can't understand why: My program is the following: int paralelo(int num) { int cont,pid; printf("Creating %d sons with pid\n", num); for(cont=0;cont<num;cont++) { pid=fork(); if(pid==0) { printf("I'm the son number %d e %d\n", cont, getpid()); exit(0); } } return(0); } int main(int … |
| | my problem is that i have written an algorihtm to convert non deterministic finite automata to deterministic finite automata but i couldn't translate it to C program and this is the algorithm i have written qx is a state in the NFA and q0 is its start state QX is … |
| | To convert integer no to roman number . .where integer is within 5000 |
| | Spiltter function split the sample.c program into 3 parts sample.dat.1 sample.dat.2 sample.dat.3 if its memory size is 300 and splited file wil hav 100 respectively . . And join function is opposite of it. . Its in unix example split -c <size> filename for join join file |
| | #include <stdio.h> #include <stdlib.h> int i=-1; main() { int a[30],n; printf("enter the no of terms: "); scanf("%d",&n); store(a,n); } int store(int a[],int y); { if(i==y) { return \\it should return and terminate exit(0); } i++; printf("enter the number: "); scanf("%d",&a{i]); store(a,y); i know i had made a mistake but where … |
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| | ` #include<stdio.h> main() { int b,c; printf("enter c :"); scanf("%d",&c); printf("enter b :"); scanf("%d",&b); printf("%d", gem()); getch(); return 0; } int gem(int b,int c) { int a; a=b+c; return a; } ` |
| | #include<stdio.h> #include<conio.h> #include<stdlib.h> main() { char ch1[20],ch2[20],*temp[10]; int i,j,count,k,p,q,len1,len2; printf("Enter the string\n"); scanf("%s",ch1); printf("Enter the string to be found\n"); scanf("%s",ch2); for(i=0;ch1[i]!='\0';i++); len1=i; for(j=0;ch2[j]!='\0';j++); len2=j; k=0; count=0; for(i=0;i<len1;i++) { if(ch1[i]==ch2[0]) { temp = &ch1[i]; k++; } } for(i=0;i<k;i++) { for(p=0;p<len1;p++) { for(q=0;q<k;q++) { if(*ch1[p]==*temp[q]) { for(j=0;j<len2;j++) { if(ch2[j]==ch1[p]) p++; if(ch2[j+1]=='\0') { … |
| | a simple question, i just can't get around at the moment - if i may if unsigned char *s = 42006f, how can I split/select the hex value into its pairs i.e 42/00/6f using portable ansi c. thanks!! |
| | hi i am making a Bcd to Binary conversion can somebody help me lessen the code? thanks. //! Converts a two-byte, 3-digit, BCD number into a binary value. extern uint16_t BcdBin( const uint8_t* const pBcdBin); //uint16_t BcdBin(const uint8_t * const pBcdBin) int main() { int Num; int A=0,B=0,C,D,E=1; int F[100]; … |
| | Hello all! I have used this forum many times in the past to solve a variety of programming related problems, but am truly stumped on a segfault within a binary search tree. I have isolated the segfault to a fscanf statement that look legitamate to me. The following code blocks … |
| | [code] class A { public: A() { cout<<"ctor A\n"; } virtual void func(int x) { cout<<"\nsj\n"; } }; int _tmain(int argc, _TCHAR* argv[]) { A objA; int *vptr = (int *)*((int *)&objA);// address of the virtual table typedef void (*fnptr)(int); fnptr f; f = (fnptr)*((int *)vptr+0);// address of func() within … |
| | I request every body on DAniweb.com that please , if any body knows about segment tree, then please either explain me it's update, making otherwise give me solid links so that i can learn from there. IT'S REALLY PATHETIC SITUATION AS I AM NOT GETTING THIS FROM WEEKS. PLEASE IT'S … |
| | I want the btnLogin_Click event to verify the username/password from the ms access database, if it matches it will take them to a certain page, if not it will give a message that user/password is incorrect try again. I really don't know where to start, can you please help first … |
| | Can someone help me complete my code? I am having trouble with it and I need some input. //#include "bigint.h" #include <stdio.h> #include <stdlib.h> #include <assert.h> #include <string.h> /* Create and implement a bigint data structure that can represent integers whose size is limited only by the memory capacity of … |
| | Hello I need to do it in ansi c Can't seem to get it to work at the moment. unsigned char *s scanf("%x", &s); I then want to do if statements based on the amount of characters contained in the variable s. Whats the easiest way to get this? An … |
| | I am looking for good C# .NET 4.0 database tutorials. I want to learn working with a database in C#, i already know SQL from another language PHP. Thnx |
| | Hi everyone well currently I am working on a simple malloc and free implementation but I am facing some problems . I get a segmentation fault this is my output inserting node 0 0xc87000 inserting node 1 0xc87014 inserting node 2 0xc87028 inserting node 3 0xc8703c inserting node 4 0xc87050 … |
| | Hello, I've a file which contains names and grades of students, and I'd like to write a program which can sort their grades (like midterm 1,midterm 2) according to user choice. I wrote as far as the choice part and opening the file, yet I don't know how to make … |
| | Can I use semaphore or mutex on MikroC? If you know , please tell me the function name or exsample code. |
| | Hi guys, I'm learning C and I still don't have some concepts very clear in my mind. I have to create a program that get the values from ARGV[] and puts into a vector: the program would work like that: ./program file1 file2 file3 My idea was to do something … |
| | Hello everyone, I stumbled upon a video about the monty hall problem, which I found very well explained, and a lot of comments below the video that were against the conclusion that it **is better to switch**. To clarify, I wrote this small program that simulates the game and allows … |
| | int n; scanf("%d\n", &n); printf("you typed %d\n", n); it seems to hang until I type one extra line of input....Can anyone explain this behaviour |
| | struct node { int info; node *left,*right; }; int main() { struct node *root; root = (struct node*)malloc(sizeof(struct node)); root->info=NULL; root->left=NULL; root->right=NULL; if(root==NULL) printf("%d",root->info); return 0; } why it doesnt print root->info? |
| | Develop a program to meet the following requirements: 1. Must use at least two functions, not including Main 2. Must use indirection (the * operator) 3. Must use a loop 4. Must use an array to hold the integers 5. Must take the integer inputs from a file Your assignment … |
| | Hi all when i execute my code it gives me this error " no data exists for the row column" can anyone please help me,,,am using access database here is my code: private void UpdateStudent_Load(object sender, EventArgs e) { OleDbDataAdapter da = new OleDbDataAdapter(); da.SelectCommand = new OleDbCommand("select * from … |
| | Can you please give me link for this tree ? I have searched alot and alot , but i am not getting how to implement it or how to use it. please give me links. it's a request to all of you. thanks. |
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