One of the very first programs I have written... Here for purely its nostalgic value :D The clearmine(int rx,int ry) function is what taught me the basics of recurssion!

minesweeper.c

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>

int main_array[10][10],disp_array[10][10],i,j,x,y,marked=0,correct=0;
//left over items :
//Game menu.
void new_random_board()
{
                      time_t seconds;
                      time(&seconds);
                      srand((unsigned int) seconds);
     for(i=0;i<10;i++)
     {
                     x=1+(int) (8.0*rand()/(RAND_MAX+1.0));//gets a random value for x;
                     y=1+(int) (8.0*rand()/(RAND_MAX+1.0));
                     if (main_array[x][y]==1)i--;
                     else main_array[x][y]=1;
     }
}

void display()
{
      system("cls");
      printf("\n\n\t\t\t\t~~Minesweeper~~\n\n\n");
      printf("\t\t  \t |");

      for(i=0;i<8;i++)printf(" %d |",i+1);
      printf("\n");
      for(i=1;i<9;i++)
      {
       printf("\t\t==================================================\n");
       printf("\t\t|   %d   ||",i);
          for(j=1;j<9;j++)
          {
              switch(disp_array[i][j])
              {
                case 10 :printf("   |");break;
                case 11 :printf(" X |");break;
                case 12 :printf(" ? |");break;
                case 13 :printf(" - |");break;
                default :printf(" %d |",disp_array[i][j]);break;
              }

          }
          printf("|   %d  |\n",i);
      }
      printf("\t\t==================================================\n");
      printf("\n\t \t\t |");
      for(i=0;i<8;i++)printf(" %d |",i+1);
      printf("\n");
      printf("\n\n no.of mines marked :)%d\n\n",marked);
}

int validate(int x,int y){
    int sum=0;
    for(i=-1;i<2;i++)
    for(j=-1;j<2;j++){
                      if(i==0&&j==0)continue;
                      else sum+=main_array[x+i][y+j];
                      }
    return sum;
    }

void clearmine(int rx,int ry)
{
     int i,j;
     for(i=-1;i<2;i++)
     {
       for(j=-1;j<2;j++)
          {
              if((i==0&&j==0)||(rx+i<1)||(ry+j<1)||(disp_array[rx+i][ry+j]==13)||(rx+i>8)||(ry+j>8))continue;
              if ((validate(rx+i,ry+j))==0)
              {
                 disp_array[rx+i][ry+j]=13;
                 clearmine(rx+i,ry+j);
              }
              else disp_array[rx+i][ry+j]=validate(rx+i,ry+j);
          }
     }
}



main()
{

int loop=1,action;
for(i=0;i<10;i++)for(j=0;j<10;j++)main_array[i][j]=0;
for(i=0;i<10;i++)for(j=0;j<10;j++)disp_array[i][j]=10;
system("");
new_random_board();

do{
      display();
      printf("\n Enter the value of the square to be selected in the format(x,y): ");
      scanf("%d,%d",&x,&y);

      printf(" Choose the action to be performed on (%d,%d):",x,y);
      printf("\n 1:Select this square.\n");
      printf(" 2:Mark this square.\n");
      printf(" 3:Have a doubt upon this square.\n");
      printf(" 4:Unmark this square.\n");
      printf(" 5: Back.\n :");

      action=getch();
      action=action-48;
      printf("%d\n",action);

   switch(action)
      {
      case 1: if((main_array[x][y])==1){
              system("cls");
              printf("\n\n\n\n\n\n\t\t\t\tOOPS...Sorry!!!\n\t\t\t\tYou Lost!!\n\t\t\t\tGAME OVER!!! :(\n");
              loop=0;}
              else {
                   if (validate(x,y)==0)
                   {
                    disp_array[x][y]=13;
                    clearmine(x,y);
                   }
                   else disp_array[x][y]=validate(x,y);
                   }
              break;

      case 2:if(disp_array[x][y]==10||disp_array[x][y]==12){
                disp_array[x][y]=11;
                if(disp_array[x][y])correct++;
                marked++;
               }
           break;

      case 3: disp_array[x][y]=12;
           break;

      case 4: if(disp_array[x][y]==11)marked--;
              disp_array[x][y]=10;
              break;
      }

      if(correct==10)
      {
              system("cls");
              printf("\n\n\n\n\n\n\t\t\t\tCongratulations!!!\n :)\n");
              printf("\n\n\n\n\n\n\t\t\t\t   YOU Won!!!\n\n\n\n\n\n\n :D\n");
              loop=0;
      }
}while (loop!=0);

system("pause");
}