sets all characters of a string to a given character by user .

 

#include<stdio.h>
#include<conio.h>
void main()
{
    char n[50];
    int i=0,j=0,b,x=0,ch;
    
    printf("enter yr string :");
    gets(n);
    
    printf("enter a character :");
    scanf("%c",&ch);
    
    while(n[j] != '\0')
    {
      if(ch == n[j])
     { 
       x=x+1;
     }
       j++;
    }
      
   
  printf("%c is occur in sting at %d time",ch,x);
    
}

output :

enter yr string :hllo enter a character :l l is occur in sting at 2 time

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