【说明】以下代码由C语言书写，在输入3个整数后，能够输出最大数和最小数。
int main(void){int a, b, c, max, min;printf("input three numbers: ");scanf("%d%d%d", &a, &b, &c);if(a＞b) /*判断1*/{max=a;min=b;}else{max=b;min=a;}if(max＜c) /*判断2*/max=c;else if(min＞c) /*判断3*/min=c;printf("max=%d\nmin=%d", max, min);return 0;}
13、【问题1】请画出该程序段的控制流图，并分析该控制流图中有多少条线性独立路径(VG.的值)。14、【问题2】为了用分支(判定)覆盖方法测试该程序，需要设计测试用例，使其能对该程序中的每个判断语句的各种分支情况全部进行过测试。对两组输入数据(1)a=3，b=5，c=7；(2)a=4，b=6，c=5，请分别写出程序中各个判断语句的执行结果(以T表示真，以F表示假)，填入答题纸的相应栏中。15、【问题3】上述两组测试数据是否能实现该程序的分支(判定)覆盖?如果能，请说明理由。如果不能，请再增设一组输入数据，使其能实现分支(判定)覆盖。
正确答案及解析
正确答案
解析
13、[解析]控制流图：
有4条线性独立路径，或V(G)=4。14、[解析]
15、[解析]不能，给出的a，b，c三个数值满足a＞b＞c
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