我正在尝试编写一个C程序来打印魔方。但是,我在构建广场时遇到错误。任何人都可以帮助找出造成这些错误的原因吗?以下是我的相关代码和我的输出:
代码:
int main(void) {
int size = 0;
int r, c;
int i = 1;
printf("What is the size of the square: ");
scanf("%d", &size);
int square[size][size];
int range = size * size;
r = 0;
c = size/2;
do {
square[r][c] = i;
i++;
r--;
c++;
if ((r == -1) && (c == size)) {
r = r + 2;
c--;
} else if (r == -1) {
r = size - 1;
} else if (c == size) {
c = 0;
} else if (square[r][c] != 0) {
r = r + 2;
c--;
}
} while (i < range);
for (r = 0; r < size; r++) {
for (c = 0; c < size; c++) {
printf("%d \t", square[r][c]);
}
printf("\n");
}
return 0;
}
输出:
What is the size of the square: 3
-4196312 1 0
3 -4196352 -13339222
4 -13360148 2
答案 0 :(得分:2)
函数作用域中的所有变量都不会初始化为零。而是将它们分配给随机值。
使用此:
int square[size][size] = {0};
您也可以使用memset
或calloc
,但这个是最简单的。
<强>校正:强>
列表初始值设定项不适用于可变大小的数组。请改用memset
:
int square[size][size];
memset(square, 0, size * size * sizeof(int));
编辑:
整个工作代码
#include <stdio.h>
#include <string.h>
int main(void) {
int size = 0;
int r, c;
int i = 1;
printf("What is the size of the square: ");
scanf("%d", &size);
int square[size][size];
memset(square, 0, size * size * sizeof(int));
int range = size * size;
r = 0;
c = size/2;
do {
square[r][c] = i;
i++;
r--;
c++;
if ((r == -1) && (c == size)) {
r = r + 2;
c--;
} else if (r == -1) {
r = size - 1;
} else if (c == size) {
c = 0;
} else if (square[r][c] != 0) {
r = r + 2;
c--;
}
} while (i < range);
for (r = 0; r < size; r++) {
for (c = 0; c < size; c++) {
printf("%d \t", square[r][c]);
}
printf("\n");
}
return 0;
}