C star pattern programming exercises and examples

Introduction

• Star patterns in C programming involve arranging asterisks (*) in various shapes and patterns using loops and conditional statements.
• They serve as excellent practice for beginners to:
  • Grasp loop constructs
  • Enhance logical thinking
  • Develop problem-solving skills
  • Practice basic C syntax

Common Star Patterns

Here are examples of common star patterns, along with their C code implementations:

1. Right-angled Triangle

C

#include <stdio.h>

int main() {
    int rows = 5;

    for (int i = 1; i <= rows; ++i) {
        for (int j = 1; j <= i; ++j) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

2. Inverted Right-angled Triangle

C

#include <stdio.h>

int main() {
    int rows = 5;

    for (int i = rows; i >= 1; --i) {
        for (int j = 1; j <= i; ++j) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

3. Pyramid

C

#include <stdio.h>

int main() {
    int rows = 5;

    for (int i = 1; i <= rows; ++i) {
        for (int j = 1; j <= rows - i; ++j) {
            printf(" ");
        }
        for (int j = 1; j <= 2 * i - 1; ++j) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

4. Inverted Pyramid

C

#include <stdio.h>

int main() {
    int rows = 5;

    for (int i = rows; i >= 1; --i) {
        for (int j = 1; j <= rows - i; ++j) {
            printf(" ");
        }
        for (int j = 1; j <= 2 * i - 1; ++j) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

5. Diamond

C

#include <stdio.h>

int main() {
    int rows = 5;

    for (int i = 1; i <= rows; ++i) {
        for (int j = 1; j <= rows - i; ++j) {
            printf(" ");
        }
        for (int j = 1; j <= 2 * i - 1; ++j) {
            printf("*");
        }
        printf("\n");
    }
    for (int i = rows - 1; i >= 1; --i) {
        for (int j = 1; j <= rows - i; ++j) {
            printf(" ");
        }
        for (int j = 1; j <= 2 * i - 1; ++j) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

Further Exploration

• Experiment with different patterns: hollow shapes, numbers, letters, etc.
• Explore nested loops for intricate patterns.
• Incorporate user input for row and column numbers.
• Challenge yourself with complex patterns.
• Use visual aids for better understanding (if available).