Question

Write a recursive function that uses the strchr() function to display the number of occurrences of a character inside a string. Create a C program to read a string of less than 10 characters and a character and calls the function.

Answer 1

#include <stdio.h>
#include <stdlib.h>

int strchr1(char* s, char ch){
   if(s == NULL || s[0] == '\0'){
      return 0;
   }
   else{
      if(s[0] == ch){
         return 1 + strchr1(s+1,ch);
      }
      else{
         return strchr1(s+1,ch);
      }
   }
}

int main (){
   char* s = (char*)malloc(sizeof(char)*11);
   char ch;
   printf("Enter string: ");
   scanf("%s",&s);
   
   printf("Enter char: ");
   scanf("%c",&ch);
   
   
   printf("Count = %d\n",strchr1(s,ch));
}

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