[计算机类试卷]计算机三级数据库技术(上机操作)机试模拟试卷78及答案与解析.doc

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计算机三级数据库技术(上机操作)机试模拟试卷 78及答案与解析 一、程序设计题 1 函数 readDat()实现从文件 in dat中读取 20行数据并存放到字符串数组 xx中 (每行字符串长度均小于 80)。请编写函数 jsSort()。其函数的功能是:以行为单位对字符申变量的下标为奇数的位置上的字符按其 ASCII码值从小到大的顺序进行排序,下标为偶数的位置上的字符仍按原来位置存放,排序后的结果仍按行重新存人字符串数组 xx中,最后调用函数 writeDat()把结果 XX输出到 out dat文件中。 例如:位置 0 1 2 3 4 5 6 7 原字符串 h g f e d C b a 处理后字符串 h a f e d e b g 【试题程序】 #include #include char xx2080; void readDat(); void writeDat(); void jsSort() void main() readDat(); jsSort(); writeDat(); void readDat() FILE*in; int i=0; char*P; in=fopen(“in dat”, “r”); while(ixxik) temp=xxEiJEj; xxij=xxik; xxik=temp;

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