Thread: smallest coin

I am trying to find the amount here.
Input

The first line of input contains an integer M, the number of coins in bank.
The second line of input contains M integers: coin1, coin2... coinN. coini represents ith coin.

Output
Print smallest possible amount of cash that you will not be able to pay in super market.

Code:

int solution(int count_coin, int coin[count_coin])
{
        float coin1=0.50,total=0.0;
	int ncoins;
	printf("Number of 50 coins : ");
	scanf("%d",&ncoins);
	total += (ncoins * coin1);
	printf("** %.2f **",total);
        return;
}