externvoiddgemm_(char*,char*,int*,int*,int*,double*,double*,int*,double*,int*,double*,double*,int*);intmain(){charta='N';chartb='N';intm=2;intn=2;intk=1;doublealpha=0.5;doubleA[2]={1.0,2.0};// m x kdoubleB[2]={3.0,4.0};// k x ndoublebeta=0.05;doubleC[4]={100.0,200.0,300.0,400.0};// 2 x 2dgemm_(&ta,&tb,&m,&n,&k,&alpha,A,&m,B,&k,&beta,C,&m);return0;}