C hatayı çözemedim

for(i=1; i<9; i++){ 
  		if(freq[i]<freq[i+1]) 
  			mod=i+1; 
  	}

#include <stdio.h> 
  #define SIZE 99 
   
  void mean(const unsigned int answer[]); 
  void median(unsigned int answer[]); 
  void mode(unsigned int freq[], unsigned const int answer[]); 
  void bubbleSort(int a[]); 
  void printArray(unsigned const int a[]); 
   
  int main(void){ 
  	 
  	unsigned int frequency[10]={0}; 
  	 
  	unsigned int response[SIZE]={ 
  	5, 5, 7 ,1 ,6 ,4, 4, 4, 1, 7, 
  	4, 8, 1, 8, 2, 5, 1, 3, 1, 5, 
  	4, 9, 8, 1, 6, 5, 7, 1, 4, 3, 
  	1, 5, 8, 4, 7, 9, 9, 1, 2, 3, 
  	8, 7, 8, 4, 2, 2, 1, 7, 7, 1, 
  	8, 9, 1, 5, 4, 7, 6, 1, 3, 5, 
  	7, 9, 1, 5, 6, 7, 6, 4, 1, 5, 
  	8, 9, 7, 2, 9, 4, 8, 1, 9, 4, 
  	8, 9, 8, 8, 8, 9, 9, 1, 4, 7, 
  	5, 4, 4, 7, 3, 1, 2, 1, 2 
  	}; 
  	 
  	printArray(response); 
  	mean(response); 
  	median(response); 
  	mode(frequency, response); 
  	printArray(response); 
  	 
  } 
   
  void mean(const unsigned int answer[]){//gönderilen dizinin ortalamasını bulur ve yazdırır 
  	 
  	int toplam=0; 
  	int i; 
  	 
  	for(i=0; i<SIZE; i++) 
  		toplam+=answer[i]; 
  		 
  	printf("Dizinin ortalamasi = %.2f\n", (float)toplam/SIZE); 
  	 
  } 
   
  void median(unsigned int answer[]){//dizinin ara degerini bulur ve yazdırır 
  	 
  	unsigned int med; 
  	 
  	bubbleSort(answer); 
  	 
  	med=answer[SIZE/2]; 
  	 
  	printf("Dizinin aradegeri=%u\n", med); 
  } 
   
  void mode(unsigned int freq[], unsigned const int answer[]){//En cok verilen puanı bulur ve yazdırır. 
  	 
  	unsigned int mod=1; 
  	int i; 
  	 
  	for(i=0; i<SIZE; i++){ 
  		switch(answer[i]){ 
  			case 1: 
  				freq[1]++;break; 
  			case 2: 
  				freq[2]++;break; 
  			case 3: 
  				freq[3]++;break; 
  			case 4: 
  				freq[4]++;break; 
  			case 5: 
  				freq[5]++;break; 
  			case 6: 
  				freq[6]++;break; 
  			case 7: 
  				freq[7]++;break; 
  			case 8: 
  				freq[8]++;break; 
  			case 9: 
  				freq[9]++;break; 
  		} 
  	} 
  	 
  	for(i=1; i<9; i++){ 
  		if(freq[i]<freq[i+1]) 
  			mod=i+1; 
  	} 
  	 
  	printf("Dizinin modu %u tekrarla %u\n", freq[mod], mod); 
  	 
  } 
   
  void bubbleSort(int a[]){//diziyi küçükten büyüğe sıralar 
  	 
  	int i; 
  	int j; 
  	unsigned int hold; 
  	 
  	for(i=1; i<SIZE; i++){ 
  		 
  		for(j=0; j<SIZE-1; j++){ 
  			 
  			if(a[j]>a[j+1]){ 
  				 
  				hold=a[j+1]; 
  				a[j+1]=a[j]; 
  				a[j]=hold; 
  				 
  			} 
  			 
  		} 
  		 
  	} 
  	 
  } 
   
  void printArray(unsigned const int a[]){//Diziyi yazdırır 
  	 
  	int i; 
  	 
  	for(i=0; i<SIZE; i++){ 
  		 
  		if(i%10==0) 
  			printf("\n"); 
  			 
  		printf("%u ", a[i]); 
  	} 
  	 
  	printf("\n"); 
  }

 
  if(freq[mod]<freq[i]) 
  			mod=i;