[英]Abort trap 6 error in C
我有這個代碼:
void drawInitialNim(int num1, int num2, int num3)
{
int board[2][50]; //make an array with 3 columns
int i; // i, j, k are loop counters
int j;
int k;
for(i=0;i<num1+1;i++) //fill the array with rocks, or 'O'
board[0][i] = 'O'; //for example, if num1 is 5, fill the first row with 5 rocks
for (i=0; i<num2+1; i++)
board[1][i] = 'O';
for (i=0; i<num3+1; i++)
board[2][i] = 'O';
for (j=0; j<2;j++) { //print the array
for (k=0; k<50;k++) {
printf("%d",board[j][k]);
}
}
return;
}
int main()
{
int numRock1,numRock2,numRock3;
numRock1 = 0;
numRock2 = 0;
numRock3 = 0;
printf("Welcome to Nim!\n");
printf("Enter the number of rocks in each row: ");
scanf("%d %d %d", &numRock1, &numRock2, &numRock3);
drawInitialNim(numRock1, numRock2, numRock3); //call the function
return 0;
}
當我用 gcc 編譯它時,它很好。 當我運行該文件時,我在輸入值后收到 abort trap 6 錯誤。
我已經查看了有關此錯誤的其他帖子,但它們對我沒有幫助。
您正在寫入不屬於您的內存:
int board[2][50]; //make an array with 3 columns (wrong)
//(actually makes an array with only two 'columns')
...
for (i=0; i<num3+1; i++)
board[2][i] = 'O';
^
改變這一行:
int board[2][50]; //array with 2 columns (legal indices [0-1][0-49])
^
到:
int board[3][50]; //array with 3 columns (legal indices [0-2][0-49])
^
創建數組時,用於初始化的值: [3]
表示數組大小。
但是,在訪問現有數組元素時,索引值是從零開始的。
對於創建的數組: int board[3][50];
合法指數是 board[0][0]...board[2][49]
編輯以解決錯誤的輸出注釋和初始化注釋
添加額外的 "\\n" 用於格式化輸出:
改變:
...
for (k=0; k<50;k++) {
printf("%d",board[j][k]);
}
}
...
到:
...
for (k=0; k<50;k++) {
printf("%d",board[j][k]);
}
printf("\n");//at the end of every row, print a new line
}
...
初始化板變量:
int board[3][50] = {0};//initialize all elements to zero
( 數組初始化討論... )
嘗試這個:
void drawInitialNim(int num1, int num2, int num3){
int board[3][50] = {0}; // This is a local variable. It is not possible to use it after returning from this function.
int i, j, k;
for(i=0; i<num1; i++)
board[0][i] = 'O';
for(i=0; i<num2; i++)
board[1][i] = 'O';
for(i=0; i<num3; i++)
board[2][i] = 'O';
for (j=0; j<3;j++) {
for (k=0; k<50; k++) {
if(board[j][k] != 0)
printf("%c", board[j][k]);
}
printf("\n");
}
}
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