Cross Multiplication

#include<stdio.h>

int main (){
    int i, j, k;

    printf("    %2d %2d %2d %2d %2d \n", 1, 2, 3, 4, 5);
    printf("___________________\n");

    for (i=0; i<5; i++) {
        printf(" %2d|", i+1);
        for(j = 0; j < 5; j++){
            k= (i + 1) * (j + 1);
            printf("%2d ", k);
        }
        printf("\n");
    }
    return 0;
}