Thread: lvalue required as left operand of assignment

I keep getting this error when I try to compile a program and cant see how to solve it. From looking at similar problems posted here it is normally to do with using the assignment = , rather than testing if equal to == . However, in this case I am trying to assign a value to a variable (to be specific the memory address of a matrix entry).

I am getting the error for lines 4,7 and 10 in this segmant of code.

Code:

int type1(int left, int L){
    int k, M, X, matrix[L][L];
    for(k=1; (k>(left-M)); k++){
        &(matrix[left][k])=0;
    }
    for(k; k<(left-X); k++){
        &matrix[left][k]=1/(X-M+1);
    }
    for(k; k<L; k++){
        &matrix[left][k]=0;
    }
}

I am stumped, can someone please explain what is wrong.

The message means, The value on the left is NOT legal to be assigned a new value.

It is likely the same cause as when you try to assign a new address to an array.
That is also not a legal/permitted thing to be done.

Tim S.

Originally Posted by Subsonics

The address of operator does not make sense on the right side of the assignment operator.

Thai guy: you might have understood it anyway, but that sentence has a typo error, i.e., "right side" should be "left side", hence the "l" in "lvalue".