Dharani Tech Edu Hub

Mini Projects in C

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Introduction

Mini projects help you apply all the concepts learned in C programming into real-world applications.

👉 They improve coding skills, logic, and project-building experience.

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Why Build Mini Projects?

• ✔ Apply theoretical knowledge
• ✔ Improve problem-solving skills
• ✔ Build portfolio
• ✔ Useful for placements

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1. Simple Calculator

👉 Perform basic operations

#include <stdio.h>

int main() {
    int a, b;
    char op;

    printf("Enter operator (+, -, *, /): ");
    scanf(" %c", &op);

    printf("Enter two numbers: ");
    scanf("%d %d", &a, &b);

    switch(op) {
        case '+': printf("Result = %d", a + b); break;
        case '-': printf("Result = %d", a - b); break;
        case '*': printf("Result = %d", a * b); break;
        case '/': printf("Result = %d", a / b); break;
        default: printf("Invalid Operator");
    }

    return 0;
}

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Sample Output

Enter operator (+, -, *, /): +
Enter two numbers: 5 3
Result = 8

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2. Student Management System

👉 Store and display student details

#include <stdio.h>

struct Student {
    int id;
    float marks;
};

int main() {
    struct Student s;

    printf("Enter ID and Marks: ");
    scanf("%d %f", &s.id, &s.marks);

    printf("ID = %d\nMarks = %.2f", s.id, s.marks);

    return 0;
}

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Sample Output

Enter ID and Marks: 1 85.5
ID = 1
Marks = 85.50

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3. Number Guessing Game

👉 Simple game using loops

#include <stdio.h>

int main() {
    int num = 7, guess;

    printf("Guess the number (1-10): ");
    scanf("%d", &guess);

    if (guess == num)
        printf("Correct!");
    else
        printf("Wrong! Try again.");

    return 0;
}

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Sample Output

Guess the number (1-10): 7
Correct!

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4. File Handling Project

👉 Save and read data from file

#include <stdio.h>

int main() {
    FILE *fp;
    char name[20];

    printf("Enter name: ");
    scanf("%s", name);

    fp = fopen("data.txt", "w");
    fprintf(fp, "%s", name);
    fclose(fp);

    fp = fopen("data.txt", "r");
    fscanf(fp, "%s", name);
    printf("Stored Name = %s", name);
    fclose(fp);

    return 0;
}

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Sample Output

Enter name: Dharani Tech Edu Hub
Stored Name = Dharani Tech Edu Hub

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Mini Projects Table

Project	Concept Used
Calculator	Operators, Switch
Student System	Structures
Guess Game	Conditions
File Project	File Handling

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Important Notes

• Combine multiple concepts
• Focus on logic
• Test programs properly

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Common Mistakes

• ❌ Not handling input correctly
• ❌ Logic errors
• ❌ Ignoring edge cases

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Pro Tips

• ✔ Start with simple projects
• ✔ Add features step-by-step
• ✔ Practice real-world problems
• ✔ Build your own projects

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Conclusion

Mini projects are the best way to learn and apply C programming. They improve skills and prepare you for real-world development.

Start building projects to become a confident programmer.

👉 This article is part of Dharani Tech Edu Hub — where learning programming is made simple and practical.