I'm new to C programming and this is my first project,can you guys point out if there are any mistakes??
Code:#include <stdio.h> #include <time.h> char square[10] = { 'o', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; int choice,stts=0; int end_turn,choice_ai=0; int r; void board(); void pc(); void user(); void srand(); void win(); int rand(); int system(); int level_error=1; void pc_easy(); void pc_hard(); void level_select(); char level; int main() { level_select(); while(stts==0) //loop while the game has not won or lost { board();//draw board user(); //human player turn win(); //check win if (level=='1') { pc_easy();//easy computer player } else if (level=='2') { pc_hard(); //hard computer player } board(); //draw board win(); //check win } } void level_select() { printf("\n----TIC-TAC-TOE-----------------------------------------------------------------\n\nchoose level\n\n1.easy\n2.hard\n"); while (level_error==1) { scanf("%c",&level); if (level=='1' || level=='2') { level_error=0; } else { printf("\ninvalid selection\n\n"); printf("choose level\n1.easy\n2.hard\n"); } } } void win() //conditions to win { if (square[1] == square[2] && square[2] == square[3]) { stts=1; if(square[1] == 'X' && square[2] == 'X' && square[3]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[4] == square[5] && square[5] == square[6]) { stts=1; if(square[4] == 'X' && square[5] == 'X' && square[6]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[7] == square[8] && square[8] == square[9]) { stts=1; if(square[7] == 'X' && square[8] == 'X' && square[9]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[1] == square[4] && square[4] == square[7]) { stts=1; if(square[1] == 'X' && square[4] == 'X' && square[7]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[2] == square[5] && square[5] == square[8]) { stts=1; if(square[2] == 'X' && square[5] == 'X' && square[8]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[3] == square[6] && square[6] == square[9]) { stts=1; if(square[3] == 'X' && square[6] == 'X' && square[9]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[1] == square[5] && square[5] == square[9]) { stts=1; if(square[1] == 'X' && square[5] == 'X' && square[9]=='X') { printf("you win\n"); } else printf("you loose\n"); } else if (square[3] == square[5] && square[5] == square[7]) { stts=1; if(square[3] == 'X' && square[5] == 'X' && square[7]=='X') { printf("you win\n"); } else printf("you loose\n"); } //condition to draw else if (square[1] != '1' && square[2] != '2' && square[3] != '3' && square[4] != '4' && square[5] != '5' && square[6] != '6' && square[7] != '7' && square[8] != '8' && square[9] != '9') { printf("draw\n"); stts=2; } else //else play on stts=0; } void user() //human player input { while (end_turn==0) //loop until the turn ends { printf("Your Move\n"); scanf("%d",&choice); //get input if (choice<10 && choice>0) //checks if the number is between 1-9 { if (square[choice]=='X' || square[choice]=='O') //check if the square is taken or not { printf("invalid move\n"); //if taken print invalid move end_turn=0; // turn do not end(go back to the input stage) } else { square[choice]='X'; //if the choice is available,assign X to the chosen square end_turn=1; //end turn } } else { printf("invalid Move\n\n"); // if the choice is out of range,print invalid and re-enter } } board(); } void pc_easy() //computer player moves { srand((unsigned)time(NULL)); // to get random numbers while (end_turn==1) //loop while the turn ends { r=rand(); choice_ai=(r % 9)+1; //random choice of the computer player if (square[choice_ai]=='X' || square[choice_ai]=='O') //checks if the choice is taken { end_turn=1; // if taken choose again } else { square[choice_ai]='O'; //if not taken assign O to the chosen square end_turn=0 ;//end turn } } } void pc_hard() //computer player moves { srand((unsigned)time(NULL)); // to get random numbers //winning moves //first row if (square[1]=='O' && square[2]=='O' && square[3]=='3') { square[3]='O'; end_turn=0; } else if (square[2]=='O' && square[3]=='O' && square[1]=='1') { square[1]='O'; end_turn=0; } else if (square[1]=='O' && square[3]=='O' && square[2]=='2') { square[2]='O'; end_turn=0; } //first column else if (square[1]=='O' && square[4]=='O' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[1]=='O' && square[7]=='O' && square[4]=='4') { square[4]='O'; end_turn=0; } else if (square[4]=='O' && square[7]=='O' && square[1]=='1') { square[1]='O'; end_turn=0; } //second row else if (square[4]=='O' && square[5]=='O' && square[6]=='6') { square[6]='O'; end_turn=0; } else if (square[4]=='O' && square[6]=='O' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[5]=='O' && square[6]=='O' && square[4]=='4') { square[4]='O'; end_turn=0; } //second column else if (square[2]=='O' && square[5]=='O' && square[8]=='8') { square[8]='O'; end_turn=0; } else if (square[2]=='O' && square[8]=='O' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[8]=='O' && square[5]=='O' && square[2]=='2') { square[2]='O'; end_turn=0; } //third column else if (square[3]=='O' && square[6]=='O' && square[9]=='9') { square[9]='O'; end_turn=0; } else if (square[3]=='O' && square[9]=='O' && square[6]=='6') { square[6]='O'; end_turn=0; } else if (square[9]=='O' && square[6]=='O' && square[3]=='3') { square[3]='O'; end_turn=0; } //third row else if (square[9]=='O' && square[8]=='O' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[9]=='O' && square[7]=='O' && square[8]=='8') { square[8]='O'; end_turn=0; } else if (square[8]=='O' && square[7]=='O' && square[9]=='9') { square[9]='O'; end_turn=0; } //across else if (square[1]=='O' && square[5]=='O' && square[9]=='9') { square[9]='O'; end_turn=0; } else if (square[1]=='O' && square[9]=='O' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[5]=='O' && square[9]=='O' && square[1]=='3') { square[1]='O'; end_turn=0; } //across 2 else if (square[3]=='O' && square[5]=='O' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[3]=='O' && square[7]=='O' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[7]=='O' && square[5]=='O' && square[3]=='3') { square[3]='O'; end_turn=0; } //defence //first row if (square[1]=='X' && square[2]=='X' && square[3]=='3') { square[3]='O'; end_turn=0; } else if (square[2]=='X' && square[3]=='X' && square[1]=='1') { square[1]='O'; end_turn=0; } else if (square[1]=='X' && square[3]=='X' && square[2]=='2') { square[2]='O'; end_turn=0; } //first column else if (square[1]=='X' && square[4]=='X' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[1]=='X' && square[7]=='X' && square[4]=='4') { square[4]='O'; end_turn=0; } else if (square[4]=='X' && square[7]=='X' && square[1]=='1') { square[1]='O'; end_turn=0; } //second row else if (square[4]=='X' && square[5]=='X' && square[6]=='6') { square[6]='O'; end_turn=0; } else if (square[4]=='X' && square[6]=='X' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[5]=='X' && square[6]=='X' && square[4]=='4') { square[4]='O'; end_turn=0; } //second column else if (square[2]=='X' && square[5]=='X' && square[8]=='8') { square[8]='O'; end_turn=0; } else if (square[2]=='X' && square[8]=='X' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[8]=='X' && square[5]=='X' && square[2]=='2') { square[2]='O'; end_turn=0; } //third column else if (square[3]=='X' && square[6]=='X' && square[9]=='9') { square[9]='O'; end_turn=0; } else if (square[3]=='X' && square[9]=='X' && square[6]=='6') { square[6]='O'; end_turn=0; } else if (square[9]=='X' && square[6]=='X' && square[3]=='3') { square[3]='O'; end_turn=0; } //third row else if (square[9]=='X' && square[8]=='X' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[9]=='X' && square[7]=='X' && square[8]=='8') { square[8]='O'; end_turn=0; } else if (square[8]=='X' && square[7]=='X' && square[9]=='9') { square[9]='O'; end_turn=0; } //across else if (square[1]=='X' && square[5]=='X' && square[9]=='9') { square[9]='O'; end_turn=0; } else if (square[1]=='X' && square[9]=='X' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[5]=='X' && square[9]=='X' && square[1]=='3') { square[1]='O'; end_turn=0; } //across 2 else if (square[3]=='X' && square[5]=='X' && square[7]=='7') { square[7]='O'; end_turn=0; } else if (square[3]=='X' && square[7]=='X' && square[5]=='5') { square[5]='O'; end_turn=0; } else if (square[7]=='X' && square[5]=='X' && square[3]=='3') { square[3]='O'; end_turn=0; } else { while (end_turn==1) //loop while the turn ends { r=rand(); choice_ai=(r % 9)+1; //random choice of the computer player if (square[choice_ai]=='X' || square[choice_ai]=='O') //checks if the choice is taken { end_turn=1; // if taken choose again } else { square[choice_ai]='O'; //if not taken assign O to the chosen square end_turn=0 ;//end turn } } } } void board() //drawing the board. { system("cls");//clear screen printf("\n----TIC-TAC-TOE-----------------------------------------------------------------\n"); printf("\nPLAYER : X\nCOMPUTER : O\n\n"); if(level=='1') printf("DIFFICULTY = EASY\n\n\n"); else if (level=='2') printf("DIFFICULTY = HARD\n\n\n"); printf(" | | \n"); printf(" %c | %c | %c \n", square[1], square[2], square[3]); printf("_____|_____|_____\n"); printf(" | | \n"); printf(" %c | %c | %c \n", square[4], square[5], square[6]); printf("_____|_____|_____\n"); printf(" | | \n"); printf(" %c | %c | %c \n", square[7], square[8], square[9]); printf(" | | \n\n"); }
