逻辑覆盖法是设计白盒测试用例的主要方法之一，它是通过对程序逻辑结构的遍历实现程序的覆盖。针对以下由C语言编写的程序，按要求回答问题。 getit( int m) { int i, k; k=sqrt(m); for ( i=2; iimage.png=k; i++) if (m % i=0) break; if ( i＞=k+1 ) printf( "%d is a selected number\n", m); else printf( "%d is not a selected number\n", m ); }1、请找出程序中所有的逻辑判断子语句。2、请将满足100%DC(判定覆盖)所需的逻辑条件填入下表。
3、请画出上述程序的控制流图，并计算其控制流图的环路复杂度VG.。假设函数getit的参数m取值范围是150image.pngmimage.png160，请使用基本路径测试法设计测试用例，将参数m的取值填入下表，使之满足基本路径覆盖要求。
正确答案及解析
正确答案
解析
1、本题考查对编程语言的理解，着重考查判断语句。程序中的逻辑判断子语句如下：i＜=k m%i==0i＞=k+111、
本题考查白盒测试用例设计方法：判定覆盖法。判定覆盖法又称为逻辑覆盖，是通过对程序逻辑结构的遍历实现程序的覆盖。
2、本题考查白盒测试用例设计方法：基本路径法。涉及的知识点包括：根据代码绘制程序流图、计算环路复杂度以及设计测试用例。注意测试用例的数目本应和环路复杂度是一致的，但存在特殊情况。控制流图：
3、环路复杂度：V(G)=4 基本路径覆盖用例：
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