リスト5 ceil関数の処理速度測定コード float* A; float* B; int n; int dim = 1024*1024*100; LARGE_INTEGER freq, begin, end; srand(1111); for( n = 0; n < dim; n++ ) { A[n] = (float)rand() / (float)(RAND_MAX); } QueryPerformanceFrequency( &freq ); QueryPerformanceCounter( &begin ); for( i = 0; i < dim; i++ ) { B[i] = ceil(A[i]); } QueryPerformanceCounter( &end ); printf( "ceil: %f sec.\n", ( (double)(end.QuadPart - b