C 程式設計作業七，選擇邏輯、重複邏輯、輸出輸入、陣列應用：解題

/* C Programming, Project 7 */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define ROW 3
#define COL 3

int marked[ROW][COL]={0}, slot[ROW][COL] = {0};
int getMarked(void);
void display(void);
int getMarked(void);
void showIcon(int); 
int oneLine(void); 
 
int main(void)
{
/* 你的程式這裡要寫  */
    int colNo, rowNo;
    int cMove, mi, mj; 
    
    do {
        printf("Input cmd: ------> ");
        scanf("%d,%d", &rowNo, &colNo);
        if ((colNo>=0&&colNo<=2)&&(rowNo>=0&&rowNo<=2)&&(marked[rowNo][colNo]!=1)) {
/*            printf("Your input ------> %d,%d\n", rowNo, colNo);    */ 
            marked[rowNo][colNo] = 1;
            slot[rowNo][colNo] = 1;
            display();
            
            /* 回應玩家的動作 */
            if (oneLine())
            {
                printf(" ---------------You win----------------\n");
                break;
            } 
            if (getMarked()==9)
                break; 
            do {
                cMove = rand()%9;
                mi = cMove/3;
                mj = cMove%3; 
            } while (marked[mi][mj] == 1);
            marked[mi][mj] = 1;
            slot[mi][mj] = -1;
            display();
            if (oneLine())
            {
                printf(" -------------Computer win--------------\n");
                break;
            } 
        } else {
            printf("---------------Error input----------------\n");
        }
    } while (getMarked() < 9);
    system("pause");
    return 0;
}

int getMarked(void)
{
    int i, j, total=0;
    for (i=0;i<3;i++)
        for (j=0;j<3;j++)
            total += marked[i][j];
    return total;
}

void display(void)
{
    int i, j; 
    for (i=0;i<ROW;i++)
    {
        for (j=0;j<COL;j++) { 
            showIcon(slot[i][j]);
            if (j<2) 
                printf("｜");
            else 
                printf("\n");
        }
        if (i<2) 
            printf("─┼─┼─\n");
        else 
            printf("\n");
    } 
}

void showIcon(int a)
{
    if (a==1)
        printf("Ｏ");
    else if (a==-1)
        printf("ｘ");
    else if (a==0)
        printf("　");
}
int oneLine(void)
{
    int i, j, total;
    for (i=0;i<3;i++)
    {
        total = 0;
        for (j=0;j<3;j++)
            total += slot[i][j];
        if (total==3 || total==-3)
            return 1;
        total = 0;
        for (j=0;j<3;j++)
            total += slot[j][i];
        if (total==3 || total==-3)
            return 1;
    }
    total = slot[0][0]+slot[1][1]+slot[2][2];
    if (total==3 || total==-3)
        return 1;
    total = slot[0][2]+slot[1][1]+slot[2][0];
    if (total==3 || total==-3)
        return 1;
    return 0;
        
} 

作業七題目
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