We know that we need to declare variables before using it in our code. However, we variables can be assigned with 0 or 1 without declaration. In the following example we can see this.
Example
#include
#include
x, y, array[3]; // implicit initialization of some variables
int main(i) {
//The argument i will hold 1
int index;
printf("x = %d, y = %d
", x, y);
for(index = 0; index < 3; index++)
printf("Array[%d] = %d
", i, array[i]);
printf("The value of i : %d", i);
}
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Output
x = 0, y = 0
Array[0] = 0
Array[1] = 0
Array[2] = 0
The value of i : 1
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有时候，如果某个数组只初始化了一部分值，那么剩下的值会被设置为0。
#include
#include
int main() {
//The argument i will hold 1
int index;
int array[10] = {1, 2, 3, 4, 5, 6};
for(index = 0; index < 10; index++)
printf("Array[%d] = %d
", index, array[index]);
}
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Output
Array[0] = 1
Array[1] = 2
Array[2] = 3
Array[3] = 4
Array[4] = 5
Array[5] = 6
Array[6] = 0
Array[7] = 0
Array[8] = 0
Array[9] = 0
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以上就是在C语言中，变量的隐式初始化为0或1的详细内容，更多请关注每日运维网(www.mryunwei.com)其它相关文章！
