Using scanf for input - Mini Project: Build & Apply

Using scanf for input

📖 Scenario: You are creating a simple program that asks a user for their age and height.

🎯 Goal: Build a C program that uses scanf to read an integer and a float from the user.

📋 What You'll Learn

Use scanf to read an integer value for age

Use scanf to read a float value for height

Print the values back to the user

💡 Why This Matters

🌍 Real World

Many programs need to get information from users, like age or height, to personalize the experience.

💼 Career

Understanding how to read user input with <code>scanf</code> is a basic skill for C programmers working on interactive applications.

1

Create variables for age and height

Declare an integer variable called age and a float variable called height.

C

// Declare variables for age and height
// Your code here

Need a hint?

Use int for whole numbers and float for decimal numbers.

2

Use scanf to read age

Add a printf statement to ask the user to enter their age. Then use scanf with "%d" to read the integer into age.

C

#include 

int main() {
    int age;
    float height;
    // Ask for age and read it
    // Your code here
    return 0;
}

Need a hint?

Remember to use &age to pass the address to scanf.

3

Use scanf to read height

Add a printf statement to ask the user to enter their height. Then use scanf with "%f" to read the float into height.

C

#include 

int main() {
    int age;
    float height;
    printf("Enter your age: ");
    scanf("%d", &age);
    // Ask for height and read it
    // Your code here
    return 0;
}

Need a hint?

Use %f to read a float value with scanf.

4

Print the age and height

Use printf to display the message: Your age is followed by age, and on the next line, Your height is followed by height with 2 decimal places.

C

#include 

int main() {
    int age;
    float height;
    printf("Enter your age: ");
    scanf("%d", &age);
    printf("Enter your height in meters: ");
    scanf("%f", &height);
    // Print age and height
    // Your code here
    return 0;
}

Need a hint?

Use %d for integers and %.2f to show float with two decimals in printf.