Metotlu bir şekilde yazdımki daha kolay anlaşılabilsin. Anlamadığın yeri sorabilirsin

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

void findSpecialCharacter(char srText[], char ch);
void calculateConsAndVowel(char str[]);
void calculateSentences(char str[]);

int main() {
    char srText[10000],ch;
    
    printf("Please enter the name: ");
    fgets(srText,sizeof(srText),stdin);
    
    printf("Please enter the character you want to find: ");
    scanf("%c",&ch);
    
    findSpecialCharacter(srText,ch);
    calculateConsAndVowel(srText);
    calculateSentences(srText);
    return 0;
}

void findSpecialCharacter(char srText[], char ch){
    int numberOfSpecialCharacter = 0;
    
    for(int i=0; srText[i] != '\0'; ++i){
        if(ch == srText[i]){
            ++numberOfSpecialCharacter;
        }
    }
    printf("Frequency of %c => %d \n",ch,numberOfSpecialCharacter);

}

void calculateConsAndVowel(char str[]){
    int numberOfConsonants = 0;
    int numberOfVowels = 0;
    
    for(int i=0; str[i] != '\n'; ++i){
        str[i] = tolower(str[i]);
        
        if(str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || 
        str[i] == 'o'|| str[i] == 'u'){
            ++numberOfVowels;
        }
        else if (isalpha(str[i])){
            ++numberOfConsonants;
        }
    }
    
    printf("Count of vowels in the string you entered: => %d \n",numberOfVowels);
    printf("Count of constants in the string you entered: => %d \n",numberOfConsonants);
}

void calculateSentences(char str[]){
    int numberOfSentences = 1; // We start suddenly because the program doesn't count the first word
    
    for(int i = 0; i < strlen(str); i++){
        
        if(str[i] == ' '){
            ++numberOfSentences;
        }
    }
    
    printf("There are %d words in total in the sentence entered.",numberOfSentences);
}