c语言指针部分题答案

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1、#includeintsubstring(char*s,char*t);intmain(){chars[50];chart[20];intnum;scanf("%s%s",s,t);num=substring(s,t);printf("%d",num);return0;}intsubstring(char*s,char*t){char*st=s;char*tt=t;intnum=0;intoffset=0;for(;*st!='';){offset=0;for(;*tt!='';){if(*st==*tt){st++,tt++,offset++;}elsebrea

2、k;}if(*tt=='')num++;else{st=st-offset+1;}tt=t;}returnnum;}#includevoidchange(char*s);voidinsert(char*s);intmain(){chars[100];scanf("%s",s);change(s);insert(s);printf("%s",s);return0;}voidchange(char*s){for(;*s!='';s++){if(((*s)>'A'&&(*s)<='V')

3、

4、((*s)>='a'&&(*s)<'v'))*s=(*s)+4;if(((*s)

5、>='W'&&(*s)<='Z')

6、

7、((*s)>='w'&&(*s)<='z'))*s=(*s)-22;}}voidinsert(char*s){chartemp[100];intsize=0,i;for(i=0;s[i]!='';i++){temp[size]=s[i];size++;temp[size]='',size++;}temp[size]='';for(i=0;temp[i]!='';i++)s[i]=temp[i];s[i]='';}#includeintreplace(char*s);intmain(){chars[50];intnum;sc

8、anf("%s",s);num=replace(s);printf("替换之后s为：%s",s);printf("总共替换了：%d个字符",num);return0;}intreplace(char*s){intnum=0;for(;*s!='';s++){if(*s=='t')*s='e',num++;if(*s=='T')*s='E',num++;}returnnum;#includeintmain(){char*weeks[7]={"monday","tuesday","wednesday","tuesday","friday","saturday","su

9、nday"};intnum;scanf("%d",&num);while(num!=0){if(num>7

10、

11、num<0)printf("不存在这样的星期制");elseprintf("%s",weeks[num-1]);scanf("%d",&num);}}#includevoidswap(int*a,int*b);voidmain(){char*str[5]={"dfefs","dds","fdse","as","a"};char*result[5]={'','','','',''};intlen[5],i,j;charnewstr[6];for(i=0;i<5;

12、i++){len[i]=strlen(str[i]);}for(i=0;i<5;i++)for(j=i;j<5;j++){if(len[i]>len[j])swap(&len[i],&len[j]);}for(i=0;i<5;i++)for(j=0;j<5;j++){if(strlen(str[j])==len[i]&&result[i]=='')result[i]=str[j];}for(i=0;i<5;i++)printf("%s",result[i]);printf("");for(i=0;i<5;++i){if(len[i]<3)newstr[i]="";elsenewstr[

13、i]=result[i][2];}newstr[i]='';printf("%s",newstr);}voidswap(int*a,int*b){inttemp=*a;*a=*b;*b=temp;}}