void make_identity_matrix(var *mat) { int i,j; for( i= 0 ; i< 4 ; i++ ) for( j= 0 ; j< 4 ; j++ ) { if(i==j) { mat[i * 4 + j]=1; } else { mat[i * 4 + j]=0; } } }
/* Matrix struct */ typedef struct { var m[4][4]; } xmatrix; void make_identity_matrix(xmatrix* mat) { mat.m[0][0]=156; }
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