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janet
Joined: 17 Feb 2004
Posts: 23
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| How to append new value at the beginning of string? |
 Posted: Tue Mar 16, 2004 2:56 am |
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let's say
| Code: |
BYTE random_value;
BYTE random_string[10];
BYTE data_string[] = "";
for (i = 0; i < 10; i++) {
random_value = rand();
sprintf(random_string, "%u", random_value);
strcat(data_string, random_string);
next;
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every new data will be appended at the end of the string.
the string will contain "random_value0 random_value1 random_value2 ..."
What if i want to reverse the order of value in the string so that new value will be appended at the BEGINNING of the string?
the end result i want to get is "random_value9 random_value8 random_value7 ... random_value0"
Cheers |
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Ttelmah
Guest
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| Re: How to append new value at the beginning of string? |
| Posted: Tue Mar 16, 2004 3:20 am |
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| janet wrote: | let's say
| Code: |
BYTE random_value;
BYTE random_string[10];
BYTE data_string[] = "";
for (i = 0; i < 10; i++) {
random_value = rand();
sprintf(random_string, "%u", random_value);
next;
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every new data will be appended at the end of the string.
the string will contain "random_value0 random_value1 random_value2 ..." strcat(data_string, random_string);
What if i want to reverse the order of value in the string so that new value will be appended at the BEGINNING of the string?
the end result i want to get is "random_value9 random_value8 random_value7 ... random_value0"
Cheers |
It'd be better (in terms of speed), to think again, and perhaps store the strings 'backwards'. You can append at the beginning, by doing:
strcat(random_string, data_string);
strcpy(data_string, random_string);
However you do it though, if you actually need to end up with th data stored this way, there will be a lot of data movement involved, since you have to shift the entire string in memory to make the space.
Best Wishes |
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