returning matrix

[Norgy]

unsigned char* intitial_Add_Round_Key(unsigned char plaintxt[16], unsigned char key[16]){
    unsigned char initial_output[16];
    for(int i=0 ; i<16 ; i++){
        initial_output[i] = plaintxt[i]^key[i];
 
    }
    return initial_output;
 
}
void main(){
    unsigned char plaintxt[16]= {0xA9, 0x58, 0x19, 0xB1,0x8C, 0x96, 0xF2, 0x63,0x45 ,0x78, 0xDE, 0xA5, 0xB7, 0x55, 0x23 , 0x12} ;
    unsigned char key[16]= {0x8F,0x78, 0xC6, 0x12, 0xBA,0x98, 0xA2,0x16, 0x8F,0x78, 0xC6, 0x12, 0xBA, 0x98, 0xA2, 0x16} ;
    unsigned char initial_output[16];
    unsigned char* t;
    t = intitial_Add_Round_Key(plaintxt,key);
    for(int h = 0 ;h<16;h++){
      printf("%u",t[h]);
      printf("\t");
    }
    //substitute_bytes(initial_output);
    scanf("%d");
 
}

i am trying to return the matrix in a variable called "t"
but it prints another number (not the matrix)

[weaknessforcats]

You can't return a matrix from a function. C/C++ lets you return a type or a pointer to a type.

A matrix is not a type. Instead it is a collection of a type. In the case of your matrix, what is being returned is the address of initial_output[0].

But there are worse problems. initial_output[16] is a local variable which is destroyed after the function completes but the returned address lets you use deleted memory, which will cause your program to crash.

You might read: http://bytes.com/topic/c/insights/77...rrays-revealed