1. Only one subscript array is called a one-dimensional array, and there are two subscript arrays called two-dimensional arrays, and an array of n subscripts is called an n-dimensional array. 2. Two-D array definition:Type descriptorarray name [constant expression1[Constant expression2］={ Value 1, value 2, ... int A[2][3] = {{7,6,3},{2,8,5}}; Description 2 rows 3 columns array 3. Constant expression 1 indicates the length of the first-dimension subscriptconstant Expression 2 indicates the length of the second-dimension subscript4. Elements of a two-D array are also known as double subscript variables5. The assignment is typically used with a two-layer for loop nesting (double loop). The outer loop controls the number of rows, and the inner loop controls the number of columns corresponding to each row. 6. Purpose of the two-D array: Game map (1 means there is an obstacle, 0 means it can be passed here), cinema ticket (1 means the location has been sold, 0 means there is a ticket for this location). 7. Precautions:(1) when a two-dimensional array is defined, the length of the first dimension may not be specified, but the second dimension must be given. (2) The number of elements is insufficient, will be automatically filled8. Right-left principle, read first to the right and encounter parentheses reverse. //Two-dimensional array exchange
int a[2][3] = {0}, b[3][2] = {0};
for (int i = 0; i < 2; i + +) {//Control the output of two-dimensional array row numbers
for (int j = 0; J < 3; J + +) {//Control the output of two-dimensional array columns
A[I][J] = arc4random ()% (100-10 + 1) + 10;//Randomly generated arrays
printf ("%d", a[i][j]);//Output array
// }
printf ("\ n");//Line break after one line of output is complete
// }
printf ("After Exchange\ n ");
for (int i = 0; i < 2; i + +) {//Controls the number of rows that are exchanged for a two-dimensional array
for (int j = 0; J < 3; J + +) {//Controls the number of columns in a two-dimensional array that is swapped
B[j][i] = a[i][j];//Number of columns in the swapped array = number of rows, number of rows = number of columns
// }
// }
for (int i = 0; i < 3; i + +) {
for (int j = 0; J < 2; J + +) {
printf ("%d", b[i][j]);
// }
printf ("\ n");
// }
//Maximum value for two-dimensional array,Determines the position of the maximum value, if multiple, outputs multiple
int number[2][3] = {0};
int max = 0;
for (int i = 0; i < 2; i + +) {
for (int j = 0; J < 3; J + +) {
NUMBER[I][J] = arc4random ()% (100-10 + 1) + 10;
printf ("%d", number[i][j]);
// }
printf ("\ n");
// }
for (int i = 0; i < 2; i + +) {
for (int j = 0; J < 3; J + +) {
max = max > Number[i][j]? MAX:NUMBER[I][J];
// }
// }
printf ("max=%d\n", Max);
for (int i = 0; i < 2; i + +) {
for (int j = 0; J < 3; J + +) {
if (max = = Number[i][j]) {
printf ("i=%d j=%d", i,j);
break;// output only one Span style= "font:18.0px Menlo; Font-variant-ligatures:no-common-ligatures; " >
// }
// }
// //printf ("\ n");9. An array, only subscript concept, give the group name and subscript can be manipulated.
Seven or two-d arrays
