Remove first 10 characters from a string in C?-CodePudding

I've got a string:

model name      : Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz

And I want to remove the first 10 characters, so that the start of the string would be the name of the CPU.

Essentially, how do I remove the first whitespaces, but not the ones in the actual name? Or, how do I remove the first 10 characters of this string?

CodePudding user response：

how do I remove the first 10 characters

Simply add 10 to your character pointer. Though in your example, you seem to actually need 18, not 10.

CodePudding user response：

You can use memmove to shift the contents of the string.

#include <stdio.h>
#include <string.h>

#define OFFSET 18

int main(void) {
    char string[] = "model name      : Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz";

    memmove(
        string,
        string   OFFSET,
        strlen(string)   1 - OFFSET);

    printf("<<%s>>\n", string);
}

<<Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz>>

CodePudding user response：

you can simply offset by 18 chars (not the 10 mentioned in the question) if you simply want to access the trailing part of the string.

 char * pointer_to_cpu = &longstring[18];

If you want to permanently erase them the memmove answer is what you need

CodePudding user response：

As an alternative to the other answers offered, if you need to save the string minus the first 10 characters as a separate item, without modifying the original:

strcpy(substr, &str[10]);

This assumes substr is a char array of sufficient size to avoid overflow.