Final Output

Part of the Logic & Flow section of Coddy's C journey — lesson 24 of 63.

Challenge

Easy

Complete your text utility program by integrating all the features you've built in the previous lessons into a single, comprehensive output. Your program should:

Prompt the user to enter a short sentence by printing: Enter a sentence: (no newline at the end — use printf("Enter a sentence: "), not printf("Enter a sentence: \n"))
Declare a character array named sentence with 200 elements to store the input
Use scanf with the %s format specifier to read a single word from the user
Store the original word in a separate character array for display purposes
Calculate the total number of characters using strlen()
Count the vowels by iterating through each character and checking if it matches any vowel (a, e, i, o, u) in both lowercase and uppercase
Convert the word to uppercase using toupper() function in a loop
Display all results in a clean, organized format with each piece of information on a separate line

Remember to include the <string.h> header for string functions and the <ctype.h> header for character conversion functions.

Your output should display all results in the following exact format:

Enter a sentence: Original: [word]
Characters: [count]
Vowels: [count]
Uppercase: [WORD]

Important: The prompt Enter a sentence: must not be followed by a newline. The word Original: appears on the same line immediately after the input is read.

For example, if the input is:

Hello

Your output should be:

Enter a sentence: Original: Hello
Characters: 5
Vowels: 2
Uppercase: HELLO

This final challenge brings together all the text processing features you've developed throughout the project: input handling, character counting with strlen(), vowel counting with loops and conditional statements, and uppercase conversion with toupper(). The program should present a clean, organized summary of the text analysis results.

Try it yourself

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

int main() {
    char sentence[200];
    
    printf("Enter a sentence: ");
    scanf("%s", sentence);
    
    printf("You entered: %s\n", sentence);
    
    int length = strlen(sentence);
    printf("Character count: %d\n", length);
    printf("Length: %d\n", length);
    
    int vowel_count = 0;
    for (int i = 0; i < length; i++) {
        char c = sentence[i];
        if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' ||
            c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
            vowel_count++;
        }
    }
    printf("Vowel count: %d\n", vowel_count);
    
    printf("Uppercase: ");
    for (int i = 0; i < length; i++) {
        printf("%c", toupper(sentence[i]));
    }
    printf("\n");
    
    return 0;
}

All lessons in Logic & Flow

1Pointers Fundamentals

What is a Pointer?Declaring Pointers The Address-Of Operator (&)The Dereference Operator (*)NULL Pointers Recap: Pointer Basics

4Project: Simple Text Utility

Project Overview Counting Characters

Counting Vowels

Convert to Uppercase

Final Output Project lesson

7Structures (structs)

What is a Struct?Declaring a Struct Creating Struct Variables Accessing Struct Members Initializing Structs Recap: Student Data Struct

10Enums and Typedef

enum for Named Constants Declaring and Using Enums Enums in Switch Statements Using typedef for Type Aliases typedef with Structs Recap: Typedef & Enum Practice