c语言 实现费诺编码！！

#include<stdio.h>  
static char p[20][20];  
void Fano(int m,int n,float y[20]);
int main(void)  
{
    int i,j,flag,count;  
    float a[20],temp,sum=0.0;  
    flag=0;  
     
        printf("Please input the amount of probabilities\n");  
        scanf("%d",&count);  
        
        while(count<=0)  
        {  
            printf("Please input the positive number! Try again!\n");  
            
            printf("Please input the amount of probabilities\n");  
            scanf("%d",&count);  
             
        }  
        while(flag==0)  
       {  
            flag=1;  
            printf("Please input all probabilities!\n");  
            for(i=1;i<=count;i++)  
            {  
                scanf("%f",&a[i]);  
                if((a[i]<0)||(a[i]>1))  
                    {
printf("Please input the number between 0 and 1\n");