Train

#include <stdio.h>
#include <string.h>

int main() 
{
    printf("\n\nTest1\n");
    main1();
    printf("\n\nTest2\n");
    main2();
    printf("\n\nTest3\n");
    main3();
    printf("\n\nTest4\n");
    main4();
    printf("\n\nTest5\n");
    main5();
    printf("\n\nTest6\n");
    main6();
    printf("\n\nTest7\n");
    main7();
    printf("\n\nTest8\n");
    main8();
    printf("\n\nTest9\n");
    main9();
    printf("\n\nTest10\n");
    main10();
    return 0;
}

void main1() 
{
    int a[] = {6, 5, 4, 3, 2, 1};
    char *b[] = {"trust", "i", "seek", "and", "i", "find", "in", "you"};
    char *c = "happy"; 
    char *d[] = {b[a[2]], b[a[0]], b[a[0] - a[5]]};
    int e[2][3] = {{0, 3, 4}, {1, 2, 7}};
    int f[] = {b[3][2] - b[4][0], a[2] + a[4], e[1][2] - e[0][1]};
    char *g = b[3];

    printf("%d\n", c[1]);
    printf("%d\n", a[2]);
    printf("%d\n", f[2] + *(f + 1));
    printf("%d\n", *(f + a[5]));
    printf("%c\n", **(d + 1)); 
    printf("%s\n", (g + 1));
    printf("%c\n", (g + 1)[1]); 
}

void main2() 
{
    int x[] = {8, 7, 6, 5, 4, 3};
    char *y[] = {"create", "hope", "discover", "believe", "reflect", "embrace"};
    char *z = "growth";
    char *w[] = {y[x[1]], y[x[2]], y[x[4] - x[5]]};
    int u[2][3] = {{1, 4, 5}, {0, 2, 6}};
    int v[] = {y[1][1] - y[2][3], x[1] + x[3], u[1][2] - u[0][0]};

    printf("%d\n", z[3]);
    printf("%d\n", x[3]);
    printf("%d\n", v[1] + *(v + 2));
    printf("%d\n", *(v + x[5]));
    printf("%c\n", **(w + 2));
    printf("%s\n", y[4] + 2);
    printf("%c\n", y[3][2]);
}

void main3() 
{
    int alpha[] = {12, 11, 10, 9, 8, 7};
    char *beta[] = {"innovation", "vision", "harmony", "insight", "courage", "persistence"};
    char *gamma = "challenge";
    char *delta[] = {beta[alpha[3] % 5], beta[alpha[1]], beta[alpha[4] - alpha[5]], gamma + 4};
    int epsilon[2][3] = {{2, 5, 8}, {1, 3, 7}};
    int zeta[] = {beta[1][epsilon[0][1]] - beta[2][epsilon[1][0]], alpha[epsilon[1][1]] - alpha[epsilon[0][0]], epsilon[0][2] * epsilon[1][2]};

    printf("%d\n", gamma[2] * gamma[5]);
    printf("%s\n", delta[2] + 3);
    printf("%d\n", zeta[2] / zeta[1]);
    printf("%c\n", beta[4][alpha[5] % 7]);
    printf("%s\n", delta[1] + (alpha[2] % 5));
    printf("%c\n", *(gamma + (zeta[0] % 10)));
    printf("%d\n", *((int*)delta[3] + 1));
}


void main4() 
{
    int matrix[3][3] = {{5, 9, 2}, {6, 3, 8}, {7, 4, 1}};
    char *words[] = {"dynamic", "creative", "efficient", "logical"};
    char letters[] = "ABCD";

    int *ptrMatrix = (int *)matrix;
    char **ptrWords = words;
    char *ptrLetters = letters;

    printf("%d\n", *(ptrMatrix + 4));
    printf("%c\n", letters[(int)strlen(*(ptrWords + 2)) - 1]);
    printf("%s\n", *(ptrWords + (matrix[2][1] % 3)));
    printf("%c\n", *(ptrLetters + matrix[0][2]));

    for (int i = 0; i < 9; i++) {
        if (*(ptrMatrix + i) % 2 == 0) {
            *(ptrMatrix + i) *= -1;
        }
    }

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            printf("%d ", matrix[i][j]);
        }
        printf("\n");
    }

    ptrLetters += 2;
    printf("%s\n", ptrLetters);
    printf("%c\n", **(ptrWords + 1));
}

void main5() 
{
    int matrix[3][3] = {{5, 9, 2}, {6, 3, 8}, {7, 4, 1}};
    char *words[] = {"dynamic", "creative", "efficient", "logical"};
    char letters[] = "ABCD";

    int *ptrMatrix = (int *)matrix;
    char **ptrWords = words;
    char *ptrLetters = letters;

    printf("%d\n", *(ptrMatrix + 4));
    printf("%c\n", letters[(int)strlen(*(ptrWords + 2)) - 1]);
    printf("%s\n", *(ptrWords + (matrix[2][1] % 3)));
    printf("%c\n", *(ptrLetters + matrix[0][2]));

    for (int i = 0; i < 9; i++) {
        if (*(ptrMatrix + i) % 2 == 0) {
            *(ptrMatrix + i) *= -1;
        }
    }

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            printf("%d ", matrix[i][j]);
        }
        printf("\n");
    }

    ptrLetters += 2;
    printf("%s\n", ptrLetters);
    printf("%c\n", **(ptrWords + 1));
}

void main6()
{
    int values[] = {10, 20, 30, 40, 50};
    char *words[] = {"ambition", "bravery", "clarity", "determination"};
    char symbols[] = "MNOP";

    int matrix[3][2] = {{values[2], values[0]}, {values[1], values[3]}, {values[4], values[2] - values[1]}};

    int *ptrValues = values;
    char **ptrWords = words;
    char *ptrSymbols = symbols;

    printf("%c\n", ptrSymbols[values[0] / 20]);
    printf("%s\n", ptrWords[matrix[0][0] / 10]);
    printf("%d\n", matrix[1][ptrSymbols[1] - 'M']);
    printf("%c\n", symbols[strlen(words[2]) - 3]);

    for (int i = 0; i < 5; i++) {
        ptrValues[i] = matrix[i % 3][i / 3] * (i + 1);
    }

    for (int i = 0; i < 5; i++) {
        printf("%d ", ptrValues[i]);
    }
    printf("\n");

    printf("%s\n", words[(ptrValues[3] - 40) / 10]);
    printf("%c\n", *(ptrSymbols + 2) + 1);
}

void main7()
{
    int numbers[] = {2, 4, 6, 8, 10};
    char *words[] = {"apple", "banana", "cherry", "date"};

    int *ptrNumbers = numbers;
    char **ptrWords = words;

    printf("%d\n", *(ptrNumbers + 2));
    printf("%s\n", *(ptrWords + 1));

    *(ptrNumbers + 1) = 5;

    for (int i = 0; i < 5; i++) {
        printf("%d ", numbers[i]);
    }
    printf("\n");

    printf("%c\n", *(*(ptrWords + 2) + 1));

    ptrNumbers += 3;
    printf("%d\n", *ptrNumbers);
}

// Function to modify array elements
void modifyArray(int *arr, int size) {
    for (int i = 0; i < size; i++) {
        arr[i] = (arr[i] % 3 == 0) ? arr[i] + 3 : arr[i] - 2;
    }
}

void main8() {
    int nums[] = {12, 15, 18, 21, 24};
    char *strings[] = {"alpha", "beta", "gamma", "delta"};
    char letters[] = "HELLO";

    int *pNums = nums;
    char **pStrings = strings;
    char *pLetters = letters;

    printf("%c\n", pLetters[*(pNums + 1) % 5]);
    modifyArray(nums, 5);
    printf("%s\n", *(pStrings + (nums[2] % 4)));

    for (int i = 0; i < 5; i++) {
        if (pNums[i] % 4 == 0) {
            pNums[i] = (int)*(pLetters + i);
        }
    }

    for (int i = 0; i < 5; i++) {
        printf("%d ", nums[i]);
    }
    printf("\n");

    printf("%c\n", *(pStrings[0] + nums[0] % 5));
    printf("%c\n", letters[nums[3] % 5]);
}

void main9() {
    char words[3][2][10] = {
        {"hello", "world"},
        {"good", "morning"},
        {"good", "night"}
    };

    printf("%s\n", words[1][1]); 
    printf("%s\n", words[2][1]);

    words[0][1][0] = 'W'; 

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 2; j++) {
            printf("%s ", words[i][j]);
        }
        printf("\n");
    }

    printf("%c\n", words[0][1][1]); 
    printf("%c\n", words[2][0][2]); 
}

void changeFirstChar(char phrases[2][3][10], int row, int col) {
    phrases[row][col][0] += 1; // Incrementing the first character of the selected string
}

void main10() {
    char phrases[2][3][10] = { 
        {"spring", "summer", "autumn"},
        {"winter", "rainy", "sunny"}
    };

    printf("%s\n", phrases[0][2]); 
    printf("%s\n", phrases[1][1]); 

    changeFirstChar(phrases, 1, 0); 

    for (int i = 0; i < 2; i++) {
        for (int j = 0; j < 3; j++) {
            printf("%s ", phrases[i][j]);
        }
        printf("\n");
    }

    printf("%c\n", phrases[1][2][3]); 
    printf("%c\n", phrases[0][1][2]); 
}