这是一个初学者的问题,但我只想尝试在这里指点指针。
如果我创建一个这样的数组数组:
int n; // n lines
cin>>n; // read in first line, number of lines in array of arrays
int **arrays =new int *[n]; // create pointer of pointer of size n
for (int i = 0; i < n; i++) { // looping through n lines to fill each
int sz; // first int of each line is line size
cin>>sz; // read in line size
int *line = new int [sz]; // create line of size sz
for (int j = 0; j < sz; j++) { // loop through individual ints in line
int x; // declare individual int
cin>>x; // read in individual int
line[j] = x; // fill line with each x
}
*(arrays+i)=line; // fill lines of 2D array
}
/*
Sample input:
2 // n lines
3 1 5 4 // first int of each line is line length
5 1 2 8 9 3
*/
我创建int **arrays
之后是否有任何方法可以在每个子阵列的长度上获取信息,例如strlen()
对int*
&#39} s,以便我可以使用双for
循环打印出来?或者,如果我想打印出来,我是否需要首先跟踪每一行的长度?