Appending 2d char array with 1d char array (in C)

Question

If I have,

matrix1[4][4] = { 'a','b','c','d',
                  'e','f','g','h',
                  'i','j','k','l',
                  'm','n','o','p'}

string1[50] = "text"

how do you go about adding a character from the matrix into the string? like if I wanted "g" added to "text" to make like string2 = textg

strcat doesn't take these parameters. Can I do something like making a separate char string2 = matrix1[2][3] and append that to string1? But what if i want more than 1 char like g and k to make textgk.

strncat(string1, matrix1[1][2], 1);strncat(string1, matrix1[2][2], 1); or char string2[50]; snprintf(string2, sizeof(string2), "%s%c%c", string1, matrix1[1][2], matrix1[2][2]);. note matrix1[1][2] : 'g' , matrix1[2][2] : 'k', matrix1[2][3] : 'l' — BLUEPIXY
– BLUEPIXY, Commented Apr 11, 2016 at 2:11

Pemdas · Accepted Answer · 2016-04-11 02:04:42Z

1

Assign it directly

text[4] = matrix [2][3];
text [5] = '\0';

Or you can do something like this.

 void appendChar(char * pString, char c)
{
    int len = strlen (pString);
    pString[len] = c;
    pString [len +1] = '\0';

}

appendChar (string1, matrix [2][3]);

Of course this function assumes pString points to a buffer big enough to hold the character to be appended.

edited Apr 11, 2016 at 2:04

answered Apr 11, 2016 at 1:58

Pemdas

5432 silver badges9 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Appending 2d char array with 1d char array (in C)

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related