void scalarmult(int n, int m, float a, float *b, float *c); 
void matrixadd(int n, int m, float *a, float *b, float *c); 
void matrixmult(int N, int K, int M, float*C, float*D, float*E);
int	GaussElimination(int, float*, float*);
void showMatrix(int n, int m, float* F); 
void showMatrix(char*name, int n, int m, float* F);
void showequation(int N, float *a, float *b);