在C语言中,如要给一个较大的【图片】的数组赋值,以下方式性能较好的是:()
A.
for ( int i = 0; i < N; i++ ) for ( int j=N - 1; j>= 0; j-- ) mat[i][j] = val;
B.
for ( int i = 0; i < N; i++ ) for ( int j=0; j < N; j++ ) mat[j][i]=val;
C.
for ( int i = N - 1; i >= 0; i-- ) for ( int j = N - 1; j >= 0; j-- ) mat[j][i] = val;
D.
for ( int i = N - 1; i >= 0; i-- ) for ( int j = N - 1; j >= 0; j-- ) mat[j][i] = val;