Help with assignment error

I am modifying some code (which I did not originally code) and have come in to this error upon compiling:

Code:

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Lvalue required as left operand of assignment

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The problem occurs here:

Code:

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temp + mat_col = (1.0 +  10.0 * rand() / ( RAND_MAX + 1.0 ) );

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where

Code:

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float*    temp;
temp = (float*) malloc(Order(local_A)*sizeof(float));

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and

mat_col is the index of the for loop where the aforementioned error occurs

Code:

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for(mat_col = 0; mat_col < Order(local_A); mat_col++)
                temp + mat_col = (1.0 +  10.0 * rand() / ( RAND_MAX + 1.0));

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I am very confident that I am missing some subtlety with a pointer. I looked up this error it it seemed like it was a typecasting error but I don't see how that is the issue. Maybe 1.0 and 10.0 are treated as doubles by the computer and not floats - I feel like I might have read that before. Any suggestions? Thanks!

temp + mat_col is not a variable that something can be assigned to (an Lvalue).
did you mean *(temp + mat_col) ?
If you have any questions please ask.

That did the trick. I guess I was changing the value of the pointer in the original code and what I should have been doing is changing to value at the address the pointer points to (by using the *(...) ) right? Thanks!

Yes, obviously.

Quote:

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Originally Posted by Elysia

Yes, obviously.

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I suppose if it were so obvious I wouldn't have asked the question in the first place. Either way, I appreciate the condescension.

Don't misunderstand me. It was meant to confirm your question.