Make a fundamental basic note for my C Programming that I am allow to use in the exam room. I know nothing about programming. the note takes one side of A4. I repeat it, I know nothing about programming.

#include <stdio.h> int a[3][4] ={ {1,2,3,4}, {5,6,7,8}, {9,10,11,12}}; int b[4][3] ={ {4,8,12}, {3,7,11}, {2,6,10}, {1,5,9}}; int c[3][3]; int i,k,j,m,n,sum; int main(){ for(i= 0; i < 3; ++i){ for(k = 0; k < 3; ++k){ sum = 0; for (j = 0; j < 4; ++j){ sum = sum + (a[i][j] * b[j][k]); } c[i][k] = sum; } } for(m = 0; m < 3; ++m){ for (n = 0; n < 3; ++n){ printf("%d ",c[m][n]); } printf("\n"); } return 0; }