问题 判断题

判断下列说法是否正确,正确的在括号内打"√",错的打"×"。

(1)读书笔记,通常有三种写法:一种是编提纲,一种是写体会,一种是摘录好句子。(  )

(2)《落花生》和《月光曲》都是状物为主的文章。(  )

(3)“我们家的后园有半亩空地。”是陈述句。(  )  

(4)“一道残阳铺水中,半江瑟瑟半江红。”意思是夕阳斜照在江面上,受光多的部分呈现出一片红色;受光少的部分呈现出深深的绿色。(  )

答案

(1)√

(2)×

(3)√

(4)×

填空题
问答题

试题一 阅读下列说明,回答问题。 【说明】 逻辑覆盖法是设计白盒测试用例的主要方法之一,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。 int XOR(char * filename, unsigned long key){ FILE * input = NULL , *output = NULL; //i char * outfilename = NULL; int len = strlen(filename); unsigned char buffer; if( (filename[len-2] == ’.’) && (filename[len-1] == ’c’) ) { //2,3 outfilename = new char[len+1]; //4 strcpy(outfilename, filename); outfilename[len-2] = ’\0’; } else{ //5 outfilename = new char[len+5]; strcpy(outfilename, filename); strncat(outfilename,".c",2); } input = fopen(filename,"rb"); if( input == NULL) { //6 cout << "Error opening file " << filename << endl; //7 delete [] outfilename; outfilename = NULL; return 1; } output = fopen(outfilename,"wb"); if( output == NULL ) { //8 cout << "Error creating output file " << outfilename << endl; //9 delete [] outfilename; outfilename = NULL; return 1; } while( ! feof(input) ) { //10 if( fread(&buffer,sizeof(unsigned char),1,input) != 1 ) { //11 if( ! feof(input) ) { //12 delete [] outfilename; //13 outfilename = NULL; fclose(input); fclose(output); return 1; } } else{ //14 buffer ^= key; fwrite(&buffer, sizeof(unsigned char),1,output); } } fclose(input); //15 fclose(output); delete [] outfilename; return 0; }

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V(G)。