在这个程序中有一行我创建了一个名为“crazy_integer”的变量。
如果我不创建这个变量，MinGW 会创建一个无限循环！我似乎对任何其他编译器都没有这个问题。
谁能告诉我这里发生了什么？
重新创建：使用 MingW 下载最新版本的 CodeBlocks，创建一个新的控制台项目，然后尝试运行该程序。
然后，尝试删除我创建“crazy_integer”的代码行并再次运行该程序。结果应该是一个无限循环。
// In this program there is a line where I create a variable called
// "crazy_integer".
//
// If I do not create this variable, CodeBlocks creates an infinite loop!
// I do not seem to have this problem with any other compiler.
//
// Can anyone tell me what is going on here?
//
// To recreate: Download the latest version of CodeBlocks with MingW, create
// a new console project, and try running this program.
//
// Then, try removing the line of code where I create "crazy_integer"
// and run the program again. The result should be an infinite loop.
#include <stdio.h>
#include <string.h>
int find_winning_move(char *, char, int);
int display_board(char *);
int is_winning_position(char *, char);
void show_win_details(int, char);
int main(void) {
int retval = 0;
char raw_data[] = "X X XO ";
char player = 'X';
printf("We are examining this board: \n");
display_board(raw_data);
find_winning_move(raw_data, player, 1);
return 0;
}
int find_winning_move(char *raw_data, char player, int depth) {
char test_position[9];
int crazy_integer=0; // Adding this line will fix an infinite loop
int i, win_result;
for (i = 0; i < 9; i++) {
if (raw_data[i] == ' ') {
strcpy(test_position, raw_data);
test_position[i] = player;
win_result = is_winning_position(test_position, player);
printf("The result of playing %c at position %d is: %d \n",
player, i, win_result);
display_board(test_position);
}
}
return 0;
}
int display_board(char *raw_data) {
char display_model[] = "[ ][ ][ ]\n[ ][ ][ ]\n[ ][ ][ ]\n";
int i, j, k; k=0;
for (i = 0; i <= 2; i++) {
for (j = 1; j <= 7; j+=3) {
display_model[ (i * 10) + j ] = raw_data[k++];
}
}
printf("%s ", display_model);
}
int is_winning_position(char *raw_data, char player) {
int i;
// Test for horizontal win
for (i = 0; i <= 6; i+=3) {
if (raw_data[i] == player
&& raw_data[i+1] == player
&& raw_data[i+2] == player)
{
return 10 + i;
}
}
// Test for vertical win
for (i = 0; i <= 2; i++) {
if (raw_data[i] == player
&& raw_data[i+3] == player
&& raw_data[i+6] == player)
{
return 20 + i;
}
}
// Test for diagonal win
if (raw_data[4] == player) {
if (raw_data[0] == player && raw_data[8] == player) {
return 31;
}
if (raw_data[2] == player && raw_data[6] == player) {
return 32;
}
}
return 0;
}
void show_win_details(int win_value, char player) {
switch (win_value) {
// Horizontal
case 10 :
printf("Horizontal win on first row for Player: %c \n",
player);
break;
case 13 :
printf("Horizontal win on second row for Player: %c \n",
player);
break;
case 16 :
printf("Horizontal win on third row for Player: %c \n",
player);
break;
// Vertical
case 20 :
printf("Vertical win on first column for Player: %c \n",
player);
break;
case 21 :
printf("Vertical win on second column for Player: %c \n",
player);
break;
case 22 :
printf("Vertical win on third column for Player: %c \n",
player);
break;
// Diagonal
case 31 :
printf("Diagonal win upper left to lower right for Player: %c \n",
player);
break;
case 32 :
printf("Diagonal win lower left to upper right for Player: %c \n",
player);
break;
default: printf("Some error occurred. \n"); break;
}
}