Count charectars in a word or sentance in C language

This programme can count number of chatectars using C language. For example: softplanet24 has 12 charectars. 

 

#include <stdio.h>

int main()

{

    int i=0, j, count=0;

    char str[80], ch;

    printf("Enter a word or sentence: ");

    gets(str);

    while(str[i] != '\0')

        i++;

    printf("Enter a charectar to count it: ");

    ch=getchar(); //or, scanf("%c", &ch);

    for(j=0; j<=i; j++)

        if(str[j] == ch)

            count++;

    printf("\n %c = %d\n", ch, count);

    return 0;

}