I am getting the following C++ error:
array must be initialized with a brace enclosed initializer From this line of C++
int cipher[Array_size][Array_size] = 0;What is the problem here? What does the error mean? Below is the full code:
string decryption(string todecrypt)
{ int cipher[Array_size][Array_size] = 0; string ciphercode = todecrypt.substr(0,3); todecrypt.erase(0,3); decodecipher(ciphercode,cipher); string decrypted = ""; while(todecrypt.length()>0) { string unit_decrypt = todecrypt.substr(0,Array_size); todecrypt.erase(0,Array_size); int tomultiply[Array_size]=0; for(int i = 0; i < Array_size; i++) { tomultiply[i] = int(unit_encrypt.substr(0,1)); unit_encrypt.erase(0,1); } for(int i = 0; i < Array_size; i++) { int resultchar = 0; for(int j = 0; j<Array_size; j++) { resultchar += tomultiply[j]*cipher[i][j]; } decrypted += char((resultchar%229)-26); } } return decrypted;
}3 Answers
The syntax to statically initialize an array uses curly braces, like this:
int array[10] = { 0 };This will zero-initialize the array.
For multi-dimensional arrays, you need nested curly braces, like this:
int cipher[Array_size][Array_size]= { { 0 } };Note that Array_size must be a compile-time constant for this to work. If Array_size is not known at compile-time, you must use dynamic initialization. (Preferably, an std::vector).
You cannot initialize an array to '0' like that
int cipher[Array_size][Array_size]=0;You can either initialize all the values in the array as you declare it like this:
// When using different values
int a[3] = {10,20,30};
// When using the same value for all members
int a[3] = {0};
// When using same value for all members in a 2D array
int a[Array_size][Array_size] = { { 0 } };Or you need to initialize the values after declaration. If you want to initialize all values to 0 for example, you could do something like:
for (int i = 0; i < Array_size; i++ ) { a[i] = 0;
}You can't initialize arrays like this:
int cipher[Array_size][Array_size]=0;The syntax for 2D arrays is:
int cipher[Array_size][Array_size]={{0}};Note the curly braces on the right hand side of the initialization statement.
for 1D arrays:
int tomultiply[Array_size]={0};
