#include <stdio.h>
#include <string.h>
 
// Definição de constantes
#define TAXA_JUROS 0.05  // 5%
 
int main() {
    // Variáveis primárias
    float valor_inicial, valor_final;
    int anos;
 
    // Solicita ao usuário que insira o valor inicial do investimento e o número de anos
    printf("Digite o valor inicial do investimento: ");
    scanf("%f", &valor_inicial);
    printf("Digite o número de anos: ");
    scanf("%d", &anos);
 
    // Calcula o valor final do investimento usando a fórmula de juros simples
    valor_final = valor_inicial * (1 + (TAXA_JUROS * anos));
 
    // Exibe o valor final do investimento
    printf("Valor final do investimento: %.2f\n", valor_final);
 
    // Declara um vetor de inteiros com 3 elementos e inicializa
    int vetor[3] = {5, 10, 15};  // Valor de exemplo
 
    // Declara uma matriz 2x2 de inteiros e inicializa
    int matriz[2][2] = {{1, 2}, {3, 4}};  // Valor de exemplo
 
    // Utiliza um ponteiro para acessar e modificar o primeiro elemento do vetor
    int *ptr = vetor;  // Ponteiro para o vetor
    *ptr = 20;  // Modifica o primeiro elemento do vetor para 20
 
    // Exibição dos valores dos elementos do vetor e matriz
    printf("Elementos do vetor:\n");
    for (int i = 0; i < 3; i++) {
        printf("vetor[%d] = %d, Endereço: %p\n", i, vetor[i], (void*)&vetor[i]);
    }
 
    printf("\nElementos da matriz:\n");
    for (int i = 0; i < 2; i++) {
        for (int j = 0; j < 2; j++) {
            printf("matriz[%d][%d] = %d, Endereço: %p\n", i, j, matriz[i][j], (void*)&matriz[i][j]);
        }
    }
 
    return 0;
}

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