Exercise 1: Structured Character Output

The following demonstrates formatted console output for creating structured patterns using standard I/O functions.

#include <stdio.h>

int main(void) {
    printf("   o       o   \n");
    printf("  <H>     <H>  \n");
    printf("  | |     | |  \n");
    return 0;
}

Exercise 2: Triangle Inequality Verification

Implementing geometric validation through logical operators to determine if three lengths can form a valid triangle.

#include <stdio.h>

int main(void) {
    double side_a, side_b, side_c;
    
    scanf("%lf %lf %lf", &side_a, &side_b, &side_c);
    
    if (side_a + side_b > side_c && 
        side_a + side_c > side_b && 
        side_b + side_c > side_a) {
        printf("Valid triangle formation\n");
    } else {
        printf("Invalid triangle formation\n");
    }
    
    return 0;
}

Exercise 3: Input Buffer Management

Handling sequential character input requires careful buffer management to prevent newline characters from interfering with subsequent reads.

#include <stdio.h>

int main(void) {
    char response1, response2;
    
    printf("Did you review the documentation? (y/n): ");
    response1 = getchar();
    
    getchar();  // Consume residual newline character
    
    printf("Did you run the test suite? (y/n): ");
    response2 = getchar();
    
    if ((response1 == 'y' || response1 == 'Y') && 
        (response2 == 'y' || response2 == 'Y')) {
        printf("\nOptimal workflow maintained.\n");
    } else {
        printf("\nProcess improvement recommended.\n");
    }
    
    return 0;
}

Exercise 4: Format Specifier Behavior

Demonstrating proper usage of scanf format strings with various data types and addressing common input parsing issues.

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main(void) {
    int num1, num2, num3;
    char sym1, sym2, sym3;
    double val1, val2;
    
    scanf("%d %d %d", &num1, &num2, &num3);
    printf("Integer values: %d, %d, %d\n", num1, num2, num3);
    
    scanf(" %c %c %c", &sym1, &sym2, &sym3);
    printf("Character symbols: %c, %c, %c\n", sym1, sym2, sym3);
    
    scanf("%lf %lf", &val1, &val2);
    printf("Floating-point values: %lf, %lf\n", val1, val2);
    
    return 0;
}

Exercice 5: Temporal Unit Conversion

Converting large time quantities between units using floatnig-point arithmetic and proper type casting.

#include <stdio.h>

#define SECONDS_PER_YEAR (365.0 * 24 * 60 * 60)

int main(void) {
    long total_seconds = 1000000000L;
    int years = (int)(total_seconds / SECONDS_PER_YEAR + 0.5);
    
    printf("One billion seconds equals approximately %d years\n", years);
    
    return 0;
}

Exercise 6: Iterative Mathematical Operations

Utilizing the pow function from the mathematics library within an input-driven loop to compute exponential growth patterns.

#include <stdio.h>
#include <math.h>

int main(void) {
    double base, result;
    
    while (scanf("%lf", &base) != EOF) {
        result = pow(base, 365.0);
        printf("%.2f raised to 365th power: %.2f\n\n", base, result);
    }
    
    return 0;
}

Exercise 7: Interactive Temperature Conversion

Implementing continuous input processing for unit conversion between Celsius and Fahrenheit temperature scales.

#include <stdio.h>

int main(void) {
    double celsius, fahrenheit;
    
    printf("Enter temperature in Celsius (Ctrl+Z to terminate):\n");
    
    while (scanf("%lf", &celsius) != EOF) {
        fahrenheit = celsius * 9.0 / 5.0 + 32.0;
        printf("Equivalent Fahrenheit: %.2f\n", fahrenheit);
        printf("Input next temperature value:\n");
    }
    
    return 0;
}

Exercise 8: Geometric Area Calculation

Applying Heron's formula to calculate triangle area from side lengths with iterative input handling.

#include <stdio.h>
#include <math.h>

int main(void) {
    double edge1, edge2, edge3;
    
    printf("Enter three side lengths for area computation:\n");
    
    while (scanf("%lf %lf %lf", &edge1, &edge2, &edge3) != EOF) {
        double semi_perimeter = (edge1 + edge2 + edge3) / 2.0;
        double area = sqrt(semi_perimeter * 
                          (semi_perimeter - edge1) * 
                          (semi_perimeter - edge2) * 
                          (semi_perimeter - edge3));
        
        printf("Triangle with sides %.0f, %.0f, %.0f has area: %.3f\n", 
               edge1, edge2, edge3, area);
    }
    
    return 0;
}