C 程序，让用户在一行中键入多个动态输入

Question

How can I take one line dynamic input like this -> 1 4 3 5 of course, It can be done with this approach ->

scanf("%d %d %d %d", &variable[0], &variable[1], &variable[2], &variable[3]);

In this example, I am taking only 4 inputs...

But my question is, how can I make it dynamic and work for a random number?

// Sample Input
3 // number of rows
5 // number of columns

// 2d array with dynamic input
1 4 3 5 97
5 6 7 4 51
2 9 8 3 0

Answer 1

Use a loop to read each array entry.

int rows, cols;
scanf("%d %d", &rows, &cols);
int variable[cols];

for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
        scanf("%d", &variable[j]);
    }
    // do something with the variable array
}

Note that scanf() doesn't make a distinction between different types of whitespace that separate tokens. So this will read all the numbers on the same line, different lines, or a mixture.