sscanf | SA : MP sscanf plugin originally made by @ Y-Less | Plugin library
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kandi X-RAY | sscanf Summary
SA:MP sscanf plugin originally made by @Y-Less
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QUESTION
I get a weird problem when running my code, I had a perfectly running code, in order to improve it I coded a little obj file loader function (which seems to work fine even if, at the moment it is not impacting the end result of the code).
The problem is, in this function I use malloc() to create tables and, due to this, I need to free() the memory at the end of the function, this free(some_pointers) don't work and mess up the whole code. I need to tell you that I'm 100% sure this line is the one causing the problem because if I remove it everything work fine (but the memory is still allocated). To sum up, in a function:
*I allocate memory (double *x = malloc(sizeof(double)*integer);)
*I'm modifying this memory (until here everything work fine)
*I free the memory free(x); (adding this line cause the program to crash)
As asked here's the full code of my function:
...ANSWER
Answered 2021-Apr-20 at 11:02*(all_x + sizeof(double)*i) = one;
QUESTION
I have tried out many ideas from SO. One of them worked (output was DEC 49 for HEX 31) when I tested it in here onlinegdb. But, when I implemented it in my application, it didn't produce same results. (output was 31 for 31 again).
The idea is to use a string value (full of HEX pairs); An example; 313030311b5b324a1b5b324a534f495f303032371b
I need to convert each integer pair (HEX) into equivalence decimal value. e.g.
...ANSWER
Answered 2021-Jun-11 at 01:19You can use strtol
function to convert your hex string to binary and then convert it to a decimal string in a single line:
QUESTION
I'm trying to parse an extension out of a list of files of the format 'filename.extension'. However in the cases where filename is blank, I'm getting undesired results.
For example....
...ANSWER
Answered 2021-Jun-09 at 17:58You can use the standard string function strchr
to determine whether a point is present and then use strcpy
to copy the file extension. For example
QUESTION
typedef struct
{
char foodCategory[15],foodName1[30],foodName2[30],foodName3[30];
double foodPrice1,foodPrice2,foodPrice3;
}Food;
void print_food()
{
Food c[300];
int lineNumber = 2,index = 1;
FILE *file = fopen("Food.txt","r");
if (file != NULL)
{
char line[300];
while (fgets(line, sizeof line, file) != NULL)
{
if (index == lineNumber)
{
sscanf(line,"%14s-%29s %lf %29s %lf %29s %lf",
c[lineNumber].foodCategory,
c[lineNumber].foodName1,
c[lineNumber].foodPrice1,
c[lineNumber].foodName2,
c[lineNumber].foodPrice2,
c[lineNumber].foodName3,
c[lineNumber].foodPrice3);
printf("---%s---\n",c[lineNumber].foodCategory);
printf("%s\t%lf\n", c[lineNumber].foodName1,c[lineNumber].foodPrice1);
printf("%s\t%lf\n", c[lineNumber].foodName2,c[lineNumber].foodPrice2);
printf("%s\t%lf\n", c[lineNumber].foodName3,c[lineNumber].foodPrice3);
}
else
{
index++;
}
}
fclose(file);
}
else
{
printf("No file found");
}
}
...ANSWER
Answered 2021-Jun-04 at 13:56Here is my solution. Basically, I replaced sscanf
by some string manipulation to parse the lines.
QUESTION
I am trying to convert some C code to JavaScript. I chose one of the simplest rules (PCR4) and removed all irrelevant parts. The goal is to generate a particular de Bruijn sequence for a particular value of n
. For example, if n = 6
, the output should be
ANSWER
Answered 2021-Jun-01 at 17:45The main issue is that in DB
you return a
. If you look at the condition of the loop just above that return, you'll see that this loop exits when a
consists only of zeroes. So it is no wonder you only get zeroes in the output.
In the C-code you referred to, DB
does not return anything. It prints. So if you want to make this a function that returns the result, you should collect the output in a variable at the same spot as where the C-code prints. This could be a JavaScript string, and then the function should return that string:
QUESTION
I'm trying to pass an array of structs to a function which fills them with data.
When I try to compile the code I am told that there is an error:
...ANSWER
Answered 2021-May-30 at 07:39Your definition and declaration of the function void loading_Profiles()
don't include any arguments, but you're calling it with an argument: loading_Profiles (Robot_t RobotInfo[]);
.
You need to change the function to accept Robot_t RobotInfo[]
as an argument and then modify the RobotInfo[]
array.
QUESTION
#include
struct BirdHome{
char area[500];
char heightcm[100];
char feederquantity[10];
char hasNest[5];
};
struct Bird{
char isRinged[5];
char nameSpecies[50];
char birdAgeMonths[500];
struct BirdHome hom;
char gender[6];
};
struct Bird birds;
int main(void){
FILE *oput;
int max=100;
int count = 0;
char filename[100];
printf("file name? : ");
scanf("%s", &filename);
count = load(filename, &birds, max);
if (count == 0)
printf("No structures loaded\n");
else (
printf("Data loaded\n")
);
save(&birds, oput);
return 0;
}
int load(char *filename, struct Bird *birds, int max){
int count = 0;
FILE *fp = fopen(filename, "r");
char line[100 * 4];
if (fp == NULL)
return 1;
while (count < max && fgets(line, sizeof(line), fp) != NULL){
sscanf(line, "%s %s %s %s %s %s %s %s", birds[count].isRinged, birds[count].nameSpecies,
birds[count].birdAgeMonths, birds[count].hom.area,
birds[count].hom.heightcm, birds[count].hom.feederquantity,
birds[count].hom.hasNest,birds[count].gender);
count++;
}
fclose(fp);
return count;
}
int save (struct Bird *birds, FILE *oput){
int i;
oput=fopen("birdssave.txt","w");
for (i=0;i<3;i++){
fprintf(oput,"%s %s %s %s %s %s %s %s\n",birds[i].isRinged, birds[i].nameSpecies,
birds[i].birdAgeMonths, birds[i].hom.area,
birds[i].hom.heightcm, birds[i].hom.feederquantity,
birds[i].hom.hasNest,birds[i].gender);
}
fclose(oput);
}
...ANSWER
Answered 2021-May-30 at 10:50The load function is made unproperly so it doesn't work. The normal functions does a lot more things to do. Here is the text of it with the needed commentaries
QUESTION
I have the following line to be put up in sscanf
but its not accepting white spaces
ANSWER
Answered 2021-May-26 at 11:26Why sscanf is not handling or ignoring spaces in c++?
How else should sscanf
seperate words/tokens?
From its documentation:
["%s"] matches a sequence of non-whitespace characters (a string)
I don't think you can handle this with sscanf
or in a one-liner at all.
You could do this with std::string::find_first_of and std::string::substr
std::regex_match might be the most flexible and readable way if you're used to regular expressions.
QUESTION
I have written supervisor application on c
on user space where I keep whitelisted id's on superblock. It reads the data from superblock :
filepath = "/dev/flashSSD"
ANSWER
Answered 2021-May-18 at 05:59Thanks to @Tsyvarev, I learned that we can read from superblock the same as from file.
QUESTION
I need to put the names separated by commas from the text into struct that expands dynamically, but I am prohibited from using realloc ().I'm getting a core dumped error in this code. What is the error in this code?
...ANSWER
Answered 2021-May-17 at 16:32It is a bad idea to overwrite the pointer movie
by newly allocated clean buffer.
Instead of that, you should
- Allocate new buffer only for
p
. - Put the new element to
p[n]
- Put existing elements
movie[0], ... , movie[n-1]
top[0], ... , p[n-1]
- Free the old buffer
movie
- Assign the new buffer
p
tomovie
Don't forget to initialize movie
not to cause troubles at the first freeing.
Also while (!feof(fp))
is wrong and you should check if readings are successful after trying to read and before using what are read.
One more important point is that you should make sure that fopen()
succeeded. Passing NULL
, which fopen()
returns on failure`, to other file manipulation functions may cause troubles.
Another point is that your arrays used for sscanf()
outputs should have one more elements for the terminating null-character.
Yet another point is that casting results of malloc()
family is considered as a bad practice.
Try this:
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