If I have char arr[10][2];
How can I initialize it? How many ways are there of doing it and which one is the best?
char arr[10][2] = {""}; Is this correct?
3 Answers
Here is some examples of how character arrays can be initialized in C. You may use any combinations of the showed initializations for any element of the array
#include <stdio.h>
int main(void)
{
char arr1[10][2] = { "A" };
char arr2[10][2] = { { "A" } };
char arr3[10][2] = { { "AB" } };
char arr4[10][2] = { { 'A', '\0' } };
char arr5[10][2] = { { 'A', 'B' } };
char arr6[10][2] = { [0] = "A" };
char arr7[10][2] = { [0] = "AB" };
char arr8[10][2] = { [0] = { "AB" } };
char arr9[10][2] = { [0] = { [0] = 'A', [1] = '\0' } };
char arr10[10][2] = { [0] = { [0] = 'A', [1] = 'B' } };
// to avoid diagnostic messages of unused variables
( void )arr1;
( void )arr2;
( void )arr3;
( void )arr4;
( void )arr5;
( void )arr6;
( void )arr7;
( void )arr8;
( void )arr9;
( void )arr10;
return 0;
}
Also you can use initializations like these
char arr1[10][2] = { "" };
char arr1[10][2] = { '\0' };
You may not use in C an initialization like this
char arr1[10][2] = {};
that is allowed in C++.
answered Nov 25, 2016 at 22:35
Vlad from Moscow
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Comments
To initialize all the strings to be empty strings, use:
char arr[10][2] = {0};
If you need to initialize them to something different, you'll have to use those values, obviously.
Comments
You can initialize it as follows:
char arr[10][2] = {
{"H"},
{"A"},
{"C"},
....
//and so on at most 10
};
0or specific values?