firstly you have printf spelt with a 1 and that would not compile.
Also remove the ' after the scanf line in the first loop as this would also make it not compile.
Your algorithm is however sound.
Try using following code
#include <stdio.h>
#define arr_size 5
void main(void)
{
float numbers[arr_size] ;
int counter;
printf("Input five numbers: \n");
for (counter = 0; counter < arr_size; ++counter)
{
printf("%i?",counter + 1);
scanf("%f", &numbers[counter]);
}
printf("Here they are:");
for (counter = 4; counter >= 0; --counter)
printf(" %g",numbers[counter]);
}