我最近制作的程序有问题。基本上,这是约翰康威人生游戏的一个简单版本,但它不能正常工作。问题在于读取单元格及其邻居状态并决定该单元格未来状态的代码。这是代码的那一部分(有点长):
#include<stdio.h>
#include<conio.h>
//Game grid size
#define SIZE 15
//Cell state (wall is a special state. It protects the other cells from garbage data of the heap memory)
enum cellState {dead,alive,wall};
//Function prototypes
int** load(int**);
void process(int**);
int main(){
//Game grid (2-D matrix) and its memory allocation
int** grid;
grid=(int**)calloc(SIZE+2,sizeof(int*));
for(int cont=0;cont<SIZE+2;cont++){
*(grid+cont)=(int*)calloc(SIZE+2,sizeof(int));
}
load(grid);
getch();
process(grid);
getch();
}
//Grid loading function
int** load(int** grid){
int type;
srand(12345);
for(int cont=0;cont<SIZE+2;cont++){
for(int cont2=0;cont2<SIZE+2;cont2++){
if(cont==0||cont==TAMANO+1||cont2==0||cont2==TAMANO+1){
*(*(grid+cont)+cont2)=wall;
}
else{
//Cell type decision
type=(int)((rand()*2+1)/32767);
if(type==dead){
*(*(grid+cont)+cont2)=dead;
}
else if(type==alive){
*(*(grid+cont)+cont2)=alive;
}
}
}
}
//Grid impression
for(int cont=0;cont<SIZE+2;cont++){
for(int cont2=0;cont2<SIZE+2;cont2++){
if(*(*(grid+cont)+cont2)==wall){
printf("W ");
}
else if(*(*(grid+cont)+cont2)==dead){
printf(". ");
}
else if(*(*(grid+cont)+cont2)==alive){
printf("C ");
}
}
printf("\n");
}
return(grid);
}
void process(int** grid){
//Temporary grid that saves the next state of a cell
int** gridTemp;
//Generations (turns) counter and live neighbours counter
int generations=0,liveNeighbours=0;
gridTemp=(int**)calloc(SIZE+2,sizeof(int*));
for(int cont=0;cont<SIZE+2;cont++){
*(gridTemp+cont)=(int*)calloc(SIZE+2,sizeof(int));
}
for(int cont=0;cont<SIZE+2;cont++){
for(int cont2=0;cont2<SIZE+2;cont2++){
if(cont==0||cont==SIZE+1||cont2==0||cont2==SIZE+1){
*(*(gridTemp+cont)+cont2)=wall;
}
}
}
//Processing loop
while(generations<100){
system("cls");
for(int cont=1;cont<SIZE+1;cont++){
for(int cont2=1;cont2<SIZE+1;cont2++){
for(int comp1=-1;comp1<2;comp1++){
for(int comp2=-1;comp2<2;comp2++){
if(comp1==0&&comp2==0) continue;
else{
//Here, we read the state of the neighbour cells of a certain cell
if(*(*(grid+cont)+cont2)==dead){
if(*(*(grid+cont+comp1)+cont2+comp2)==alive){
liveNeighbours+=1;
}
}
else if(*(*(grid+cont)+cont2)==alive){
if(*(*(grid+cont+comp1)+cont2+comp2)==alive){
liveNeighbours+=1;
}
}
}
}
}
//Future state calculation. Here is where the code fails. This if compares the state of a certain cell and the "dead" enumeration
if(*(*(grid+cont)+cont2)==dead){
if(liveNeighbours==3){
*(*(gridTemp+cont)+cont2)==alive;
}
else{
*(*(gridTemp+cont)+cont2)==dead;
}
}
if(*(*(grid+cont)+cont2)==alive){
//It also fails here. This if checks the value of the liveNeighbours variable
if(liveNeighbours>=2&&liveNeighbours<=3){
*(*(gridTemp+cont)+cont2)==alive;
}
//And here too
if(liveNeighbours<2||liveNeighbours>3){
*(*(gridTemp+cont)+cont2)==dead;
}
}
liveNeighbours=0;
}
}
//Here, the program copies the temporary grid onto the normal grid
for(int cont=0;cont<SIZE+2;cont++){
for(int cont2=0;cont2<SIZE+2;cont2++){
*(*(grid+cont)+cont2)=*(*(gridTemp+cont)+cont2);
if(*(*(grid+cont)+cont2)==wall){
printf("W ");
}
else if(*(*(grid+cont)+cont2)==dead){
printf(". ");
}
else if(*(*(grid+cont)+cont2)==alive){
printf("A ");
}
}
printf("\n");
}
generations++;
getch();
}
return;
}
使用 Dev-C++ 调试工具,我能够看到代码在我标记的点处失败。简单地说,即使满足条件,它也会忽略那些“if”指令中的代码。
我也多次重建这段代码并在另一个编译器中尝试过,但它也失败了。Turbo-C++ 表示 bad if 指令中的代码无效。