Question

In all cases we have an array of int or char of some fixed size. The program will prompt the user to enter some values, such as:

Enter 7 integers to be stored in the array: 5 13 8 5 1 2   
The questions that could then be asked of this data might be:

1. Count how many numbers are < the last element
2. Count how many numbers are odd
   

Similarly we might prompt for character input:

Enter 7 characters to be stored in the array: azaleas
The questions that could then be asked of this data might be:

1. Count how many letters occur more than once are equal to the last character
2. Count how many letters are equal to some user input letter

Your code to do the task will need to be in a function.

Answer 1

#include<stdio.h>
#include<string.h>
int countNumbers(int arr[],int n);
int oddCount(int arr[],int n);

int lastCharCount(char chArray[]);
int userCharCount(char chArray[],char ch);
int main(){
   //code for integer array
   int n,i;
   int lsthanLast,oddNumCount;
   printf("Enter size of array : ");
   scanf("%d",&n);
   int arr[n];
   for(i=0;i<n;i++){
       scanf("%d",&arr[i]);
   }
   lsthanLast =countNumbers(arr,n);
   printf("less than last number count : %d\n",lsthanLast);
   oddNumCount=oddCount(arr,n);
   printf("odd numbers count : %d\n",oddNumCount);
  
   //code starts for character array
   char chArray[100];
   int lCharCount,uCharCount;
   printf("Enter character array : ");
   scanf("%s",&chArray);
   lCharCount=lastCharCount(chArray);
   printf("last character count : %d\n",lCharCount);
   char ch;
   printf("Enter character to find frequency : ");  
   scanf(" %c",&ch);
   uCharCount=userCharCount(chArray,ch);
   printf("user character count : %d",uCharCount);
   return 0;
}
//for finding less than last number count
int countNumbers(int arr[],int n){
   int i,last=arr[n-1],count=0;
   for(i=0;i<n-1;i++){
       if(arr[i]<last)
           count++;
   }
   return count;
}
//for finding count of odd nubmers
int oddCount(int arr[],int n){
   int i,oCount=0;
   for(i=0;i<n;i++){
       if(arr[i]%2!=0){
           oCount++;
       }
   }
   return oCount;
}
//for finding last character count
int lastCharCount(char chArray[]){
   int i,len,lcount=0;
   char lchar;
   len=strlen(chArray);
   lchar=chArray[len-1];
   for(i=0;i<len-1;i++){
       if(lchar==chArray[i]){
           lcount++;
       }
   }
   return lcount;
}

//for finding user character count
int userCharCount(char chArray[],char ch){
   int i,len,ucount=0;
   len=strlen(chArray);
   for(i=0;i<len;i++){
       if(ch==chArray[i]){
           ucount++;
       }
   }
   return ucount;
}