[C] copy string question

[Alan]

hi, i want to separate a string into different parts and copy them to other
array, how can i do that?

Char s[11] = "12345.6789";
Char long_d[4] = "000",
long_m[8] = "00.0000";

e.g. i want to copy s to long_d and long_m so that
long_d[4] = "123" and long_m[8] = "45.6789"

thx

 

[Artie Gold]

hi, i want to separate a string into different parts and copy them to other
array, how can i do that?

Char s[11] = "12345.6789";

Erm, that's `char', not `Char'.

Char long_d[4] = "000", Similarly.
long_m[8] = "00.0000";

e.g. i want to copy s to long_d and long_m so that
long_d[4] = "123" and long_m[8] = "45.6789"

Use strncpy().

HTH,
--ag

 

[Alan]

hi, i want to separate a string into different parts and copy them to other
array, how can i do that?

Char s[11] = "12345.6789";

Erm, that's `char', not `Char'.

Char long_d[4] = "000", Similarly.
long_m[8] = "00.0000";

e.g. i want to copy s to long_d and long_m so that
long_d[4] = "123" and long_m[8] = "45.6789"

Use strncpy().

but when i use
strncpy(long_d,s,3);
strncpy(long_m,s,7);
i just got long_d[4] = "123" and long_m[8] = "12345.6"

 

[Jeff Schwab]

hi, i want to separate a string into different parts and copy them to

other

array, how can i do that?

Char s[11] = "12345.6789";

Erm, that's `char', not `Char'.

Char long_d[4] = "000",
Similarly.

long_m[8] = "00.0000";

e.g. i want to copy s to long_d and long_m so that
long_d[4] = "123" and long_m[8] = "45.6789"

Use strncpy().

but when i use
strncpy(long_d,s,3);
strncpy(long_m,s,7);
i just got long_d[4] = "123" and long_m[8] = "12345.6"

You can always ignore any number of characters at the beginning of the
string (up to the length of the string), and still have a valid string.
In this case, you want to skip the first three:

strncpy( long_m, s + 3, 7 );

Since the string you want is indicated by the address of the fourth
element (which has index 3), you could also do it this way:

strncpy( long_m, &s[3], 7 );