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How do I restrict a float value to only two places after the decimal point in C?
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printf("%.2f", 37.777779);
If you want to write to C-string:
char number[24]; // dummy size, you should take care of the size!
sprintf(number, "%.2f", 37.777779);
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Changing one character in a string
What is the easiest way in Python to replace a character in a string?
11 Answers
11
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How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
50 Answers
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How do I get bit-by-bit data from an integer value in C?
...s:
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char** argv)
{
unsigned
input = 0b0111u,
n_bits = 4u,
*bits = (unsigned*)malloc(sizeof(unsigned) * n_bits),
bit = 0;
for(bit = 0; bit < n_bits; ++bit)
bits[bit] = (input >...
Reading CSV file and storing values into an array
... This also will not properly parse a CSV written like column1;"Special ; char in string";column3 - tools.ietf.org/html/rfc4180
– Ole K
Oct 23 '15 at 14:55
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Replace one substring for another string in shell script
...easily breaks on any nontrivial input string (irregular spacing, shell metacharacters, etc).
– tripleee
Jul 17 '18 at 16:54
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手机蓝牙控制台灯：HC-05 开关、无级调光、定时关灯（附 .aia 源码与单片机...
...);
analogWrite(LAMP, 0);
}
void loop() {
while (bt.available()) {
char c = bt.read();
if (c == '\n') {
line.trim();
if (line.startsWith("L:")) {
int level = constrain(line.substring(2).toInt(), 0, 100);
analogWrite(LAMP, map(level, 0, 100, 0, 255));
b...
Java: Clear the console
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System.out.println(new String(new char[50]).replace("\0", "\r\n")); will do the job faster and better.
– Aaron Esau
Dec 30 '17 at 0:28
1
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Transmitting newline character “\n”
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Try using %0A in the URL, just like you've used %20 instead of the space character.
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What is the best way to test for an empty string in Go?
...tever, since len() has to execute to completion.
– Richard
Apr 30 '18 at 11:25
Have you looked at the code generation ...