Thread: Array of Struct issue

Hello, I am new to C and I have to work with it because of need to use existing code. I went through several sites and this is my last hope. Please advise.


I have a file that defines a simple struct .. something like:

Code:

typedef struct{
  double x;
  double y;
  double z;
} Point;

Now, I have an array of type point

Point setA[anchorSize];

what I am trying to do but having issues with is as follows:

Code:

for(i=0;i<foobar;i++){
   setA[i]={pt1,pt2,pt3};//pt1-pt3 are some double values
}

However, that does not work for me. I am not sure what I am doing wrong or if this is even allowed but I get something like this for error:
remodelProtein.c:261: parse error before '{' token

This however does compile but it seems silly:

Code:

for{blabla}{
   Point tempPt={pt1,pt2,pt3};
   SetA[i]=tempPt;
}

Do I have to do it this way? Please advise

Much Much Much love and thanks for any help you can provide :smile:

what about

Code:

for(i=0;i<foobar;i++){
   setA[i].x=pt1;
   setA[i].y=pt2;
   setA[i].z=pt3;
}

or

Code:

Point tempPt={pt1,pt2,pt3};
for{blabla}{
   SetA[i]=tempPt;
}

Kurt

I do not believe you can do the following:

Code:

for(i=0;i<foobar;i++){
   setA[i]={pt1,pt2,pt3};//pt1-pt3 are some double values
}

...because that method is only possible for initialization. Since setA[] has already been initialized earlier, you will need to set each field individually, as ZuK wrote.

Hope this helps...

I thought that was clear.
the statement

Code:

setA[i]={pt1,pt2,pt3};

is not valid c.
This syntax can only be used to initialize variables.
The above statement is not an initialization. Is an assignement -> syntax error.
Kurt
Edit: KidA was a lot faster.

sorry, ok this is a snipped of the code that WORKS

Code:

			
			currAtom=rnaList[RNA_FILE_COUNTER-1].atomList[p];
			if(q<anchorSize*3){
				Point temp1={currAtom.x[anchorPos[0]],currAtom.y[anchorPos[0]],currAtom.z[anchorPos[0]]};
				Point temp2={currAtom.x[anchorPos[1]],currAtom.y[anchorPos[1]],currAtom.z[anchorPos[1]]};
				Point temp3={currAtom.x[anchorPos[2]],currAtom.y[anchorPos[2]],currAtom.z[anchorPos[2]]};
				SetA[q+0]=temp1;
				SetA[q+1]=temp2;
				SetA[q+2]=temp3;
				q=q+3;
			}

and when this snippet of the code is replaced with the following one I am getting way too many errors:

Code:

currAtom=rnaList[RNA_FILE_COUNTER-1].atomList[p];
			if(q<anchorSize*3){
				SetA[q+0]={currAtom.x[anchorPos[0]],currAtom.y[anchorPos[0]],currAtom.z[anchorPos[0]]};
				SetA[q+1]={currAtom.x[anchorPos[1]],currAtom.y[anchorPos[1]],currAtom.z[anchorPos[1]]};
				SetA[q+2]={currAtom.x[anchorPos[2]],currAtom.y[anchorPos[2]],currAtom.z[anchorPos[2]]};
				q=q+3;
			}

Sec i will try to get a better error report.