need help using a while loop
Hi all,
My problem is this: I'm doing a small game in C and the problem is that in my only while loop that I'm using, I call a function. Now when I enter a letter, as required by my code, the while loop executes twice and if I type just [Enter] than it executes only once. I have no idea what I'm doing wrong and I ask if anyone could help me solving this issue. Thank you and much appreaciate your help. Here is my code:
Code:
/*
Purpose: a C game used to implement a puzzle using an array
*/
#include <stdio.h>
#include <conio.h>
#include <ctype.h>
//declare global variables used in program
int table[4][4] = {{1,4,15,7},{8,10,2,11},{14,3,6,13},{12,9,5,0}};
int count = 0;
//provide the prototype of each function
void displayTable(void);
void moveNumbers(void);
void moveRight(void);
void moveLeft(void);
void moveUp(void);
void moveDown(void);
int checkForFinish(void);
int keepCounting(int);
//start the main function
main(void){
displayTable();
int finished = 0;
while(finished != 1){
moveNumbers();
finished = checkForFinish();
}
printf("Congratulations! You finished the game!");
printf("\n\nPress any key to exit... ");
getche();
}
//function used to move the numbers in the grid
void moveNumbers(){
int key;
printf("\n\nEnter a letter(L,R,U or D): ");
key = getchar();
key = tolower(key);
if(key == 'l')
moveLeft();
if(key == 'r')
moveRight();
if(key == 'u')
moveUp();
if(key == 'd')
moveDown();
displayTable();
keepCounting(key);
}
//moves the number to the right
void moveRight(){
int temp,i,j;
for(i = 0; i < 4; i++){
for(j = 0; j < 4; j++){
if(table[i][j] == 0 && j != 0){
temp = table[i][j-1];
table[i][j-1] = 0;
table[i][j] = temp;
}
}
}
}
//moves the number to the left
void moveLeft(){
int temp,i,j;
for(i = 3; i >= 0; i--){
for(j = 3; j >= 0; j--){
if(table[i][j] == 0 && j != 3){
temp = table[i][j+1];
table[i][j+1] = 0;
table[i][j] = temp;
}
}
}
}
//moves the number up
void moveUp(){
int temp,i,j;
for(i = 3; i >= 0; i--){
for(j = 3; j >= 0; j--){
if(table[i][j] == 0 && i != 3){
temp = table[i+1][j];
table[i+1][j] = 0;
table[i][j] = temp;
}
}
}
}
//moves the number down
void moveDown(){
int temp,i,j;
for(i = 0; i < 4; i++){
for(j = 0; j < 4; j++){
if(table[i][j] == 0 && i != 0){
temp = table[i-1][j];
table[i-1][j] = 0;
table[i][j] = temp;
}
}
}
}
//function used to display the table
void displayTable(){
int i,j;
for(i = 0; i < 4; i++){
printf("\n\n");
for(j = 0; j < 4; j++){
if(table[i][j] == 0)
printf(" ");
else if(table[i][j] < 10)
printf(" %d ",table[i][j]);
else
printf("%d ",table[i][j]);
}
}
printf("\n");
}
//function used to check if the grid is arranged from 1 to 15
int checkForFinish(void){
int i,j,temp,result;
result = 0;
temp = 1;
for(i = 0; i < 4; i++){
for(j = 0; j < 4; j++){
if(table[i][j] == temp){
temp += 1;
}
}
}
if(temp == 15)
result = 1;
return result;
}
//function used to keep count of user moves
int keepCounting(int userOption){
if (userOption != 0){
count += 1;
}
printf("\n\nTotal number of moves taken so far is: %d", count);
}
