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//字符大小写转换示例//输入一行字符，将其中的小写字母转换为大写字母。//请选择相应位置的正确内容#include "stdio.h"#include "string.h"int main(){char str[80];unsigned int i;printf("请输入一行文字：\n");gets(str);//读入字符串并存入各数组元素中去printf("\n转换前：");printf("%s",str);//注意这儿用的格式符为%s而不是%cprintf("\n转换后：");for(i=0;i='a'))//若为小写字母则进行转换printf("%c",[A请选择]);//转换为对应大写字母并输出elseprintf("%c",[B请选择]); //不是小写字母，原样输出printf("\n\n");return 0;}

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//多个字符串操作示例//对乱序的城市名称（共137个城市名），请将其按字母表顺序排列生成一个有序表以方便查看。//请选择相应位置的正确内容#include "stdio.h"#include "string.h"#define N 137int main(){//多定义一行，有效数据从1号行开始存放，初始化时给0号行赋空串//列数取15，因城市名最长为7个汉字， 14个字符，加上结束标志'\0'，共15个char str[N+1][15]={"","北京市","上海市","天津市","重庆市","香港特别行政区","澳门特别行政区","合肥市","毫州市","芜湖市","马鞍山市","池州市","黄山市","滁州市","安庆市","淮南市","淮北市","蚌埠市","巢湖市","宿州市","宣城市","六安市","阜阳市","铜陵市","明光市","天长市","宁国市","界首市","桐城市","福州市","厦门市","泉州市","漳州市","南平市","三明市","龙岩市","莆田市","宁德市","建瓯市","武夷山市","长乐市","福清市","晋江市","南安市","福安市","龙海市","邵武市","石狮市","福鼎市","建阳市","漳平市","永安市","兰州市","白银市","武威市","金昌市","平凉市","张掖市","嘉峪关市","酒泉市","庆阳市","定西市","陇南市","天水市","玉门市","临夏市","合作市","敦煌市","甘南州","南宁市","贺州市","玉林市","桂林市","柳州市","梧州市","北海市","钦州市","百色市","防城港市","贵港市","河池市","崇左市","来宾市","东兴市","桂平市","北流市","岑溪市","合山市","凭祥市","宜州市","贵阳市","安顺市","遵义市","六盘水市","兴义市","都匀市","凯里市","毕节市","清镇市","铜仁市","赤水市","仁怀市","福泉市","海口市","三亚市","万宁市","文昌市","儋州市","琼海市","东方市","五指山市","石家庄市","保定市","唐山市","邯郸市","邢台市","沧州市","衡水市","廊坊市","承德市","迁安市","鹿泉市","秦皇岛市","南宫市","任丘市","葉城市","辛集市","涿州市","定州市","晋州市","霸州市","黄骅市","遵化市","张家口市","沙河市","三河市","冀州市","武安市"};unsigned int i,j;for(j=1;j<=N-1;j++)for(i=j+1;i<=N;i++)if([A请选择])//j行与i行进行比较{//利用0号行实现j行与i行的交换strcpy(str[0],str[j]);//利用函数strcpy()实现字符串赋值[B请选择][C请选择]}printf("按字母顺序排列的结果如下：\n\n");for(i=1;i<=N;i++)//序号3位，右对齐，不足3位补前导0；城市名16位，左对齐printf("%03d:%-16s",i,[D请选择]);//%-16s表示占16位，左对齐printf("\n");return 0;}

【8-5】（1）程序改错。程序功能：输入一行英文文本，将每一个单词的第一个字母变成小写。修改程序中的错误以后运行程序，写出输出结果。#include #include //tolower函数,toupper函数的头文件/【1】FOUND/void fun(char p){int k=0;/【2】FOUND/do while(p=='\0'){if(k==0&&p!=' '){p=tolower(p);/【3】FOUND/k=0;}else if(p!=' ')k=1;elsek=0;/【4】FOUND/p++;}}int main(){void fun(char *p);char str[81];printf("please input a English text line:");gets(str);printf("The original text line is :");puts(str);fun(str);printf("The new text line is :");puts(str);return 0;}

【8-5】（2）程序改错程序功能：从字符串s中删除指定的字符c。修改程序中的错误以后运行程序，写出输出结果。#include /【1】FOUND/fun(char s[ ],char c){int i,j=0;/【2】FOUND/for(i=0;i

【8-5】（3）程序改错程序功能：从键盘输入若干个数，保存在数组x中，当输入为0的时候结束输入，计算数组元素中值为负数的平均值(不包括0)。修改程序中的错误以后运行程序，写出输出结果。#include double fun(int s[]){/****【1】FOUND/int sum=0.0;int c=0,i=0;/*【2】FOUND/while(s[i] =0){if (s[i]<0){sum+=s[i];c++;}i++;}/【3】FOUND/sum\=c;/【4】FOUND******/return c;}int main(){int x[1000];int i=0;do{scanf("%d",&x[i]);} while(x[i++]!=0);printf("%lf\n",fun(x));return 0;}