Frequency_char_str.c

//program to print frequency of each character in a string

#include <stdio.h>
#include <string.h>

void count(char *str1)
{
    char str[30], ch;
    int i, j, count, n;
    strcpy(str, str1);
    n = strlen(str);

    for (i = 0; i < n; i++)
    {
        if (str[i] != 0)
        {
            ch = str[i];
            count = 0;
            for (j = 0; j < n; j++)
                if (str[j] == ch)
                {
                    count++;
                    str[j] = 0;
                }
            printf("%c occurs %d times\n", ch, count);
        }
    }
}

int main(void)
{
    char str[30];
    printf("Enter a string: ");
    gets(str);
    count(str);
    return 0;
}