File content as of revision 5:85178023086a:

#include "mbed.h"
 
// Initail I/O.
AnalogIn VRx(A2);
AnalogIn VRy(A3);
DigitalIn Button(D13);

// Initial function.
char check_joys(int jx,int jy);
int check_joys_int(int jx,int jy);
int check_correctPosition(int X,int Y);
int get_position(int input_position,int ship_type);
void Select_Position(char M);
void print_metrix();


// Initial variable.
int select_Position = 0;
int check_ship2 = 0;
int ship_flor[8][8] = {{0}}; //__________________________________________________This is ship area.
int ship4[4] = {0};
int ship3[3] = {0};
int ship2[2][2] = {{0}};
int ship1[4] = {0};

int main(){ //-------------------------------------------------------------------Main Function.
    float Vx;
    float Vy;
    int SW,iVxVy,iSW,n;
    int iShipType = 0;
    int select_Ship[8] = {4,3,2,2,1,1,1,1};
    char m;
    while(1) {
        if(iShipType<8){
            Vx = VRx.read() * 1024;
            Vy = VRy.read() * 1024;
            SW = Button.read();
            
            m = check_joys(Vx,Vy);
            n = check_joys_int(Vx,Vy);
            if(n == 1){ //_______________________________________________________ For make sure coordinate is press 1 time.
                iVxVy = 0;
            }
            if(SW == 1){ //______________________________________________________ For make sure switch is press 1 time.
                iSW = 0;
            }
            if(m!=NULL && iVxVy==0){ //__________________________________________ Get position that wait for press switch.
                //printf("%c\n",m);
                Select_Position(m);
                printf("select_Position = %d\n",select_Position);
                iVxVy = 1;
            }
            if(SW==0 && iSW==0){ //______________________________________________If switch pressing by human.
                printf("Wait!\n");
                if(get_position(select_Position,select_Ship[iShipType])==0){ //__Please read explanation in function get_position.
                    printf("Pls. input correct position\n");
                }else{
                    iShipType++;
                }
                iSW = 1;
                print_metrix();
            }
        }else{
            break;
        }
        //printf("x: %d ||y: %d ||sw: %d\n",(int)Vx,(int)Vy,SW);
        wait(0.1);
    }
    while(1){
        printf("Ready to play\n");
    }
}

char check_joys(int jx,int jy){ //-----------------------------------------------Check joystick that it up,down,left or right.
    if(jx < 24.0){
        return 'a';
    }
    else if(jx > 1000.0){
        return 'd';
    }
    else if(jy < 24.0){
        return 'w';
    }
    else if(jy > 1000.0){
        return 's';
    }else{
        return NULL;
    }
}
int check_joys_int(int jx,int jy){ //--------------------------------------------Check joystick that it is centre.
    if(jx>=450.0&&jx<=600.0){
        if(jy>=450.0&&jy<=600.0){
            return 1;
        }else{
            return 0;
        }
    }else{
        return 0;
    }
}
void Select_Position(char M){ //-------------------------------------------------Change position of cursor (Joystick).
    switch(M){
        case 'a':
            if(select_Position%10!=0){select_Position = select_Position - 1;}
            break;
        case 'd':
            if(select_Position%10!=7){select_Position = select_Position + 1;}
            break;
        case 'w':
            if(select_Position/10!=0){select_Position = select_Position - 10;}
            break;
        case 's':
            if(select_Position/10!=7){select_Position = select_Position + 10;}
            break;
    }
}
int get_position(int input_position,int ship_type){ //---------------------------Plot ship in ship area.
    int i,x,y = 0;
    int error = 0;

    x = input_position/10;
    y = input_position%10;

    for(i=0;i<ship_type;i++){
        if(check_correctPosition(x,y) == 0){
            error = 1;
            break;
        }else{
            if(ship_type == 4){ship4[i] = (x*10)+y;}
            else if(ship_type == 3){ship3[i] = (x*10)+y;}
            else if(ship_type == 2){ship2[check_ship2][i] = (x*10)+y;check_ship2++;}
            else if(ship_type == 1){ship1[i] = (x*10)+y;}
        }
        if(ship_type%2 == 0){
            x++;
        }else{
            y++;
        }
    }
    if(error == 1){
        return 0;
    }else{
        x = input_position/10;
        y = input_position%10;
        for(i=0;i<ship_type;i++){
            ship_flor[x][y] = ship_type;
            if(ship_type%2 == 0){
                x++;
            }else{
                y++;
            }
        }
        return 1;
    }
}
int check_correctPosition(int X,int Y){
    if(X<=7||Y<=7){
        if(ship_flor[X][Y] == 0){
            return 1;
        }else{
            return 0;
        }
    }else{
        return 0;
    }
}
void print_metrix(){
    for(int i=0;i<8;i++){
        for(int j=0;j<8;j++){
            printf("| %d |",ship_flor[i][j]);
        }
        printf("\n");
    }
}