If I want to parse the first 3 characters from the char array as a double, ignoring the following characters, do I really need to do this? int main() { const char a[] = "1.23"; char *b = malloc...

I am using strtod( ) function to extract an environment variable as a string, and then changing it to double using strtod: enter code here char strEnv[32]; strncpy(strEnv, getenv("LT_LEAK_START"...

#include<stdio.h> #include<string.h> int main() { char s[100] ="4.0800" ; printf("float value : %4.8f\n" ,(float) atoll(s)); return 0; } I expect the output should be 4.08000...

Suppose you have a string like "0.1" that can be only approximately represented as a binary floating point number, and you want to convert it to single precision floating point. This can be done as...

I am working on converting parts of a C++ program to Python, but I have some trouble replacing the C function strtod. The strings I'm working on consists of simple mathmatical-ish equations, such a...

In my experiments this expression double d = strtod("3ex", &end); initializes d with 3.0 and places end pointer at 'e' character in the input string. This is exactly as I would expect it to...

Here's my test code: errno = 0; d = strtod("1.8011670033376514e-308", NULL); With this code, I get d == 1.8011670033376514e-308 and errno == ERANGE. From strtod(3): If the correct value woul...

I have a value I read in from a file and is stored as a char*. The value is a monetary number, #.##, ##.##, or ###.##. I want to convert the char* to a number I can use in calculations, I've tried ...

im using strtod() to convert some inputstrings. while checking my code with valgrind, i came accross a "invalid read of size 8". the message shows up if b starts with "i" or "n", thats what i disco...

I'm having trouble understanding C's rules for what precision to assume when printing doubles, or when converting strings to doubles. The following program should illustrate my point: #include &lt...

The following test always produces failures or bus errors for me on my Intel Mac Mini. Compiler: uname -a: Darwin vogon13 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu...