C语言程序输出结果：%2d，%3.2f，%4.1f 格式化输出

C语言程序段输出结果：int a=1234；\nfloat b=123.456；\ndouble c=12345.54321；\nprintf（"%2d，%3.2f，%4.1f"，a，b，c）；\n\nA.无结果\nB.12, 123.46, 12345.5\nC.1234,123.46,12345.5\nD.1234,123.45, 1234.5\n\n正确答案：C.1234,123.46,12345.5