1.Creating a matrix
You can declare a matrix in two ways://Static #define ROWS 4 #define COLUMNS 4 int smatrix[ROWS][COLUMNS] //Dynamic int **dmatrix = NULLIf you declare the matrix as dynamic you must allocate it.
2.Assigning values a matrix
You can assign values to the matrix either by using known values or by reading the values from the keyboard.//Assigning with to predefined value #define VALUE 5 int i,j; for(i=0;i<ROWS;i++) { for(j=0;j<COLUMNS;j++) { matrix1[i][j] = VALUE; } } //Reading values from keyboard int i,j; puts("Input matrix values: "); for(i=0;i<ROWS;i++) { for(j=0;j<COLUMNS;j++) { scanf("%d",&matrix[i][j]); } }Also, the matrix can be fully assigned at creation:
int matrix[ROWS][COLUMNS]={ {1,2,3,4}, {3,4,5,6}, {2,3,4,9}, {9, 9, 9, 9}};
3.Outputing to Console
To output a matrix, you must output every element to console. In order to underline the matrix type, you must put an endline after showing each column.#include<stdio.h> #define ROWS 3 #define COLUMNS 3 int main(void) { int matrix[ROWS][COLUMNS] = { {1,2,3}, {1,2,3}, {3,2,1} }; int i,j; for(i=0;i<ROWS;i++) { for(j=0;j<COLUMNS;j++) { printf("%d ",matrix[i][j]); } putchar('\n'); } return 0; } /*Output 1 2 3 1 2 3 3 2 1 */
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