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Reading 2 arrays and output from big to small

Terribad13 (42)
// bigger, a, and b are parallel arrays.
// function's job is to set each element of big to larger of
// the corresponding element of a and the corresponding element of b.
// all 3 arrays are the same size, each having els elements.
// For example, if a held {1, 2, 3, 4, 5, 6, 7} and b held {10, 8, 6, 4, 2, 0, -2},
// and bigger were an array of 7 doubles, then
// then setBigger( bigger, a, b, 7 ) would set the array bigger to hold
// {10, 8, 6, 4, 5, 6, 7}
void setBigger( double bigger[], const double a[], const double b[], unsigned els );

These are the instructions for our last homework assignment of the semester. He JUST taught us how to use arrays so I am still a big confused on how to do this.

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void setBigger(double bigger[], const double a[], const double b[], unsigned els) {
	double big = 0;
	for (unsigned pos = 0; pos < els; pos++){
		double big = 0;
		for (unsigned pos1 = 0; pos1 < els; pos++) {
			if (a[pos1] > big) {
				big = a[pos1];
				bigger[pos] = a[pos1];
			}
			if (b[pos1] > big) {
				big = b[pos1];
				bigger[pos] = b[pos1];
			}
			
		}
	}


This is what I have so far. The problem I have with my current code is that it will set all positions in the array bigger[] to the largest number in a[] and b[].

Any suggestions on how to make sure it doesn't read the last character it copied into the array bigger[] ?

All help is appreciated! (please no direct answers. Just guidance)
JLBorges (13770)
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for each position pos in [ 0, els ) 
    set bigger[pos] <- larger_of( a[pos], b[pos] )
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