PRF192_workshop-7

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>

void menu(void);
bool input(char a[]);
int countword(char a[]);
void splitword(char a[]);
void rmv_space(char a[]);
void properform (char a[]);
bool checkname(char a[]);

int main() {
    int choice;
    char a[91], b[91], ch;
    bool inputcheck = false;

    while (1) {
        while (1) {
            system("cls");
            menu();
            printf("                     Enter your selection (0 -> 5): ");
            fflush(stdin);
            ch = '\0';
            scanf("%d%c", &choice, &ch);
            printf("\n");
            if (choice >= 0 && choice <= 5 && ch == '\n') {
                break;
            }
            printf("                     Your selection is incorrect\n");
            printf("\n");
            printf("           Press any key to continue...");
            getch();
        }


        if (choice == 0) { // get out while(1) if choice == '0'
            break;
        }
        switch (choice) {
            case 1: {
                inputcheck = input(a);
                break;
            }
            case 2: {
                if (inputcheck == false) {
                    printf("           Please input first!\n");
                }
                else {
                    printf("           The original string: ");
                    puts(a);
                    printf("           It has %d words, there are:\n", countword(a));
                    splitword(a);
                }

                break;
            }
            case 3: {
                if (inputcheck == false) {
                    printf("           Please input first!\n");
                }
                else properform(a);
                break;
            }
            case 4: {
                if (inputcheck == false) {
                    printf("           Please input first!\n");
                }
                else {
                    printf("           The original string: ");
                    puts(a);
                    strcpy(b, a);
                    rmv_space(b);
                    printf("           The cleaned form: ");
                    puts(b);
                }
                break;
            }
            case 5: {
                if (inputcheck == false) {
                    printf("           Please input first!\n");
                }
                else {
                    bool x = checkname(a);
                    if ( x == true) {
                        printf("           The string '%s' is a valid name\n", a);
                    }
                    else {
                        printf("           The string '%s' is not a valid name\n", a);
                    }
                }
                break;
            }
        }
        printf("\n");
        printf("           Press any key to continue...");
        getch();
    }
    return (0);
}

void menu(void) {
    printf("                     +-----------------------------------------+\n");
    printf("                     |             Words Processing            |\n");
    printf("                     +-----------------------------------------+\n");
    printf("                     | 1. Input a string                       |\n");
    printf("                     | 2. Split string into words              |\n");
    printf("                     | 3. Convert a string into proper form    |\n");
    printf("                     | 4. Remove redundant spaces              |\n");
    printf("                     | 5. Check valid name                     |\n");
    printf("                     | 0. Exit                                 |\n");
    printf("                     +-----------------------------------------+\n\n");
}

bool input(char a[]) {
    bool check = false;

    while (1) {
        printf("           Input a string: ");
        fflush(stdin); strcpy(a, "\0");
        scanf("%[^\n]", a);
        if (strlen(a)>0 && strlen(a)<=90) {
            check = true;
            break;
        }
        else if (strlen(a) == 0) {
            printf("           Invalid string, please re-enter.\n");
        }
        else {
            printf("           String too long, please re-enter (Max = 90).\n");
        }
    }
    return (check);
}

int countword(char a[]) {
    int count = 0;

    if (a[0] != ' ') {
        count++;
    }
    for (int i = 0; i <= (strlen(a)-2); i++) {
        if (a[i] == ' ' && a[i+1] != ' ') {
            count++;
        }
    }
    return (count);
}

void splitword(char a[]) {
    char b[91], *token;

    strcpy(b, a);
    token = strtok(b, " ,.?\t");
    while (token != '\0') {
        printf("           \t");
        puts(token);
        token = strtok(NULL," ,.?\t");
    }
}

void rmv_space(char b[]) {
    int x;

    /* Remove redundant spaces */
    x = strlen(b);
    for (int i = 0; i <= (x-2); i++) {  /* Replace \t by space */
        if (b[i] == '\t') {
            b[i] = ' ';
        }
    }
    for (int i = 0; i <= (x-2); i++) {
        if (b[0] == ' ') { /* Clear first space in b[0] */
            for (int j = 0; j <= (x-2); j++) {
                b[j] = b[j+1];
            }
            b[x-1] = '\0';
            x--;
            i--;
        }
        if (b[i] == ' ' && b[i+1] == ' ') { /* Clear double space */
            for (int j = i+1; j <= (x-2); j++) {
                b[j] = b[j+1];
            }
            b[x-1] = '\0';
            x--;
            i--;
        }
        if (b[x-1] == ' ') { /* Clear last space in b[0] */
            b[x-1] = '\0';
            x--;
        }
    }
}

void properform(char a[]) {
    char b[91];

    strcpy(b, a);
    rmv_space(b);
    if (islower(b[0])) {
        b[0] = toupper(b[0]);
    }
    for (int i = 0; i <= strlen(b)-2; i++) {
        if (b[i] == ' ' && islower(b[i+1])) {
            b[i+1] = toupper(b[i+1]);
            i++;
        }
    }

    printf("           The original string: ");
    puts(a);
    printf("           The proper form: ");
    puts(b);
}

bool checkname(char a[]) {
    for (int i = 0; i < strlen(a); i++) {
        if (isalpha(a[i]) == false && a[i] != ' ') {
            return (false);
        }
    }
    return (true);
}