All Questions
85 questions
1
vote
1
answer
190
views
Better way to write a csv in C with many variables and digit specifiers?
I currently have something like 13+ variables and 500,000 datapoints I'm outputting to a csv file, and I might add more outputs later since the project is in its early stages. The last fprintf line is ...
- 35
0
votes
1
answer
4k
views
Using printf() to output the correct number of decimal places?
When I enter 2, I wish to get this output:
value: 2.4
But when I do the multiplication, I am getting this:
value: 2.400000
This is my code:
#include <stdio.h>
int main()
{
float num;
...
user19033592
-1
votes
1
answer
199
views
Retain formatting in printf with %s [closed]
So I have a string char *str = someString(); and I want to print the string and retain any formatting that may be present in the string with printf("%s", str); So for instance, if str were ...
- 79
0
votes
1
answer
77
views
How do I align my last column according the the column using Printf
I have a problem of trying to align the last column of numbers according to the third column header using C programming.I would like to set the width of a column to 15 characters. Any ideas would be ...
0
votes
1
answer
234
views
Read format specifiers from text file
Is there a way to read a format specifier, such as %s or %d from a text file and then use this specifier in a string variable for a printf later on?
For example, if I had a file that contains
foo=%s
...
- 3
0
votes
1
answer
302
views
Effect of type casting on printf function
Here is a question from my book,
Actually, I don't know what will be the effect on printf function, so I tried the statements in the original system of C lang. Here is my code:
#include <stdio.h&...
- 5,606
1
vote
1
answer
185
views
Print a array of strings nicely in C
I am working with C printing the array of strings which is so huge
Ex:
static const char * const fruits[] =
{
"apple",
"banana",
"pine apple",
"two apple",
&...
- 203
1
vote
4
answers
1k
views
Printing a variable number of arguments to a format string
Given a format string, a counter variable for the number of specifiers and an array of the strings to be inputted, how could this be printed?
Here's an example:
char *format_str = "str(%s)ing(%s)&...
- 65
0
votes
2
answers
318
views
Creating a format string with a variable number of specifiers
I am trying to use va_list & its associated macros with vsprintf() to create a format string that has a variable number of specifiers. Here is an example program I wrote in which the number of ...
- 65
8
votes
3
answers
939
views
What's the difference between printf("%.d", 0) and printf("%.1d", 0)?
I'm working on recoding printf and I'm blocked for a moment now with the precision flag. So I read that the default precision when type conversion specifier is d is 1:
So I supposed that there is no ...
- 93
1
vote
1
answer
354
views
Output formated table with fprintf
Is there any easy way to format that table?
I am reading a txt file using a structure. But when printing it on the screen it not organised.
fprintf(stdout,"%d.\t'%s'\t%d\t%d\t%d\n",read.serial,...
3
votes
1
answer
852
views
How to fill in blank (integer) places with zero in C?
I want to add a leading zero in a C integer. I am making a clock. Here is the code I have so far:
int main(){
while (1){
time_t present;
time(&present);
struct tm *myTime = ...
- 4,495
-1
votes
1
answer
46
views
Why can I printf with the wrong specifier and still get output?
My question involves the memory layout and mechanics behind the C printf() function. Say I have the following code:
#include <stdio.h>
int main()
{
short m_short;
int m_int;
m_int ...
- 2,537
0
votes
1
answer
2k
views
How can i insert newline character('\n') when i use snprintf in C
I tried this code
void print_formatted(void) {
char buffer[100];
char line[15];
FILE* fp;
char* message = "Hello World in C language"
fp = fopen("test.txt","w");
snprintf(...
- 95
2
votes
1
answer
2k
views
C printf : conditional format depending on the base of an int value
I have an unsigned int variable x which value is comprised between from 0 and 0xFFFFF and I would like to print it in a way more readable for the user.
If x is greater than 0xF000, print it in ...
- 932