c语言习题答案(第6章，新版第7章)（潭浩强，清华出版社）

补充第6章数组

6.10
main()
{int i,j,uppn,lown,dign,span,othn;
char text[3][80];
uppn=lown=dign=span=othn=0;
for(i=0;i<3;i++)
   {gets(text[i]);
    for(j=0;j<80&&text[i][j]!='\0';j++)
      {if(text[i][j]>='A'&&text[i][j]<='Z')
         uppn++;
       else if(text[i][j]>='a'&&text[i][j]<='z')
         lown++;
       else if(text[i][j]>='0'&&text[i][j]<='9')
         dign++;
       else if(text[i][j]==' ')
         span++;
       else
         othn++;
       }
    }
for(i=0;i<3;i++)
   printf("%s\n",text[i]);
printf("uppn=%d\n",uppn);
printf("lown=%d\n",lown);
printf("dign=%d\n",dign);
printf("span=%d\n",span);
printf("othn=%d\n",othn);
}

6.11
main()
{static char a[5]={'*','*','*','*','*'};
int i,j,k;
char space=' ';
for(i=0;i<=5;i++)
   {printf("\n");
    for(j=1;j<=3*i;j++)
      printf("%1c",space);
    for(k=0;k<=5;k++)
      printf("%3c",a[k]);
    }
}

6.12
#include<stdio.h>
main()
{int i,n;
char ch[80],tran[80];
gets(ch);
i=0;
while(ch[i]!='\0')
   {if((ch[i]>='A')&&(ch[i]<='Z'))
      tran[i]=26+64-ch[i]+1+64;
    else if((ch[i]>='a')&&(ch[i]<='z'))
      tran[i]=26+96-ch[i]+1+96;
    else
      tran[i]=ch[i];
    i++;
    }
n=i;
for(i=0;i<n;i++)
   putchar(tran[i]);
}

6.13
main()
{char s1[80],s2[40];
int i=0,j=0;
scanf("%s",s1);
scanf("%s",s2);
while(s1[i]!='\0')i++;
while(s2[j]!='\0')s1[i++]=s2[j++];
s1[i]='\0';
printf("s=%s\n",s1);
}

6.14
#include<stdio.h>
main()
{int i,resu;
char s1[100],s2[100];
gets(s1);
gets(s2);
i=0;
while((s1[i]==s2[i])&&(s1[i]!='\0'))i++;
if(s1[i]=='\0'&&s2[i]=='\0')resu=0;
else
resu=s1[i]-s2[i];
printf("s1=%s,s2=%s,resu=%d\n",s1,s2,resu);
}

6.15
#include"stdio.h"
main()
{char from[80],to[80];;
int i;
scanf("%s",from);
for(i=0;i<=strlen(from);i++)
to[i]=from[i];
printf("%s\n",to);
}