C Program to Find the Number of Characters in a String

#include <stdio.h>

#include <conio.h>

void main()

{

    char str[]="Noone can understand programming easily";

    int i,count=0;

    char ch;

    printf("Enter required character: ");

    scanf("%c",&ch);

    for(i=0;str[i]!='\0';i++)

        {
          if(str[i]==ch)
            count++;
        }

    printf("Number of '%c' is %d",ch,count);

    getch();

}

OUTPUT:

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