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数组是一种数据格式,能够存储多个同样类型的值。以下主要以int型数组为例。 一维数组: 例如:int score[10]={1,2,3,4,5,6,7,8,9,0}; 通常我们在遍历这个数组的时候会书写: #include using namespace std; int main() { int score[10]={1,2,3,4,5,6,7,8,9,0}; for (int i = 0; i int score[10]={1,2,3,4,5,6,7,8,9,0}; for(int i= 0;i int score[3][3] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; printf("score地址:%p\n", score); printf("score[0]地址:%p\n", score[0]); printf("score[1]地址:%p\n", score[1]); printf("score[2]地址:%p\n", score[2]); printf("score[0][0]地址:%p\n", &score[0][0]); printf("score[1][0]地址:%p\n", &score[1][0]); printf("score[2][0]地址:%p\n", &score[2][0]); return 0; }输出结果 这里先说明结果: 在二维数组中,数组名就是数组第一行的首地址,如果score+1,相当于从第一行首地址移动到了第二行的首地址。 #include int main() { int score[3][3] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; printf("score地址:%p\n", score); printf("score+1地址:%p\n", score+1); printf("score[0]地址:%p\n", score[0]); printf("score[1]地址:%p\n", score[1]); printf("score[2]地址:%p\n", score[2]); printf("score[0][0]地址:%p\n", &score[0][0]); printf("score[1][0]地址:%p\n", &score[1][0]); printf("score[2][0]地址:%p\n", &score[2][0]); return 0; }
所以按照这个推理,score[0]是二维数组的第一行,是一个一维数组,如果score[0]+1,会移动一维数组的一个元素。在int型数组中,相当于移动了4个字节。 #include int main() { int score[3][3] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; printf("score地址:%p\n", score); printf("score+1地址:%p\n", score+1); printf("score[0]地址:%p\n", score[0]); printf("score[0]+1地址:%p\n", score[0]+1); printf("score[1]地址:%p\n", score[1]); printf("score[2]地址:%p\n", score[2]); printf("score[0][0]地址:%p\n", &score[0][0]); printf("score[0][0]+1地址:%p\n", &score[0][0]+1); printf("score[1][0]地址:%p\n", &score[1][0]); printf("score[2][0]地址:%p\n", &score[2][0]); return 0; }
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