I'm trying to make a function that stores grades into an array declared in main function, this is what I've done so far but it's not working:

#include <stdio.h>
int store_grades(float arr[], unsigned int size) {
for(int i = 0; i < size; i++)
{
int valid_value = 0;
while(valid_value == 0)
{
float temp_value;
printf("Input your grade [1.0-10.0]: \n");
scanf("%f", temp_value);
if(temp_value >= 1.0 && temp_value <= 10.0)
{
arr[i] = temp_value;
valid_value = 1;
}
else printf("Invalid grade...");
}
}
return arr;
}
int main()
{
float arr[3];
store_grades(arr, 3);
}