frequency of a character in file

 #include <stdio.h>

#include <string.h>

int main() {

    char sentence[100];

    char ch;

    int count = 0;

    printf("Enter a sentence: ");

    fgets(sentence, sizeof(sentence), stdin);

    printf("Enter the character to count: ");

    scanf(" %c", &ch);

    for (int i = 0; sentence[i] != '\0'; i++) {

        if (sentence[i] == ch) {

            count++;

        }

    }

    printf("Frequency of '%c' in the sentence: %d\n", ch, count);

    return 0;

}