a7=a1+6;
a8=a2+6;
a9=a3+6;
/* make sure that each line and each row is made up with three members in different group.*/
/* such as: a9 a1 a5
a2 a6 a7
a4 a8 a3 */
if(((a1+a5+a9) == (a2+a6+a7)) && ((a1+a5+a9) == (a3+a4+a8))
&& ((a1+a6+a8) == (a5+a7+a3)) && ((a1+a5+a9) == (a2+a4+a9))) {
printf("%d %d %d\n%d %d %d\n%d %d %d\n",a9,a1,a5,a2,a6,a7,a4,a8,a3); return;
}
}
}
}
5.4
#include <stdio.h>
void main(void)
{
char input1[100],input2[100],input3[100];
int i,Eng=0,eng=0,num=0,blank=0,other=0;
printf("Input 3 rows of character,each row don't exceed 80 characters:\n");
gets(input1);
printf("The second row:\n");
gets(input2);
printf("The third row:\n");
gets(input3);
/*test the first row*/
for(i=0; i<100; i++)
{
if(input1[i]=='\0')
goto Loop1;
else if(('A'<=input1[i])&&(input1[i]<='Z')==1)
Eng++;
else if(('a'<=input1[i])&&(input1[i]<='z')==1)
eng++;
else if(('0'<=input1[i])&&(input1[i]<='9')==1)
num++;
else if(input1[i]==32)
blank++;
else other++;
}
/*test the second row*/
Loop1: for(i=0; i<100; i++)
{
if(input2[i]=='\0')
goto Loop2;
else if(('A'<=input2[i])&&(input2[i]<='Z')==1)
Eng++;
else if(('a'<=input2[i])&&(input2[i]<='z')==1)
eng++;
else if(('0'<=input2[i])&&(input2[i]<='9')==1)
num++;
else if(input2[i]==32)
blank++;
else other++;
}
/*test the third row*/
Loop2: for(i=0; i<100; i++)
{
if(input3[i]=='\0')
goto Loop3;
else if(('A'<=input3[i])&&(input3[i]<='Z')==1)
Eng++;
else if(('a'<=input3[i])&&(input3[i]<='z')==1)
eng++;
else if(('0'<=input3[i])&&(input3[i]<='9')==1)
num++;
else if(input3[i]==32)
blank++;
else other++;
}
Loop3: printf("Upper english character:%d\nLower english character:%d\nNumber:%d\nBlank:%d\nOther characters:%d\n",Eng,eng,num,blank,other); }
5.5
#include <stdio.h>
void main(void)
char str1[80],str2[40];
int i,j,k;
/*Input two string*/
printf("Please input the first string\n str1=");
gets(str1);
printf("Please input the second string\n str2=");
gets(str2);
/*Get the end of str1*/
for(i=0; i<80; i++)
{
if(str1[i]=='\0')
break;
}
/*Copy str2 to str1*/
for(j=i,k=0; str2[k]!='\0';k++,j++)
str1[j]=str2[k];
str1[i+k]='\0';
puts(str1);
}
5.6
#include <stdio.h>
struct student
{char name[20];
int score;
}stu[5],stu1;
void main(void)
{ int i,j;
printf("Input student's score and name(5),seperate using the character of ',' :\n");
for(i=0; i<5; i++)
scanf("%d,%s",&stu[i].score,&stu[i].name);
/*sorting*/
for(i=0; i<5; i++)
for(j=0; j<4-i; j++)
if(stu[j].score>stu[j+1].score)
{stu1=stu[j];stu[j]=stu[j+1];stu[j+1]=stu1;}
printf("After sotred,score and name:\n");
for(i=0; i<5; i++)
printf("%d,%s\n",stu[i].score,stu[i].name);
}
5.7
#include<stdio.h>
main()
{ int a[3][3],i,j,m,n,o,p;
printf("Please input a 3*3 shuzu:\n");
for (i=0;i<=2;i++)
for (j=0;j<=2;j++)
scanf("%d",&a[i][j]);
for (i=0;i<=2;i++)
{ m=(a[i][0]>a[i][1])? a[i][0]:a[i][1];
n=(m>a[i][2])? m: a[i][2];
}
for (j=0;j<=2;j++)
{ o=(a[0][j]<a[1][j])? a[0][j]:a[1][j];
p=(o<a[2][j])? o: a[2][j];
}
if (n==p)
printf("Andian is %d\\n",p);
else
printf("There is no andian.\\n");
}
5.8
#include <stdio.h>
void main(void)
{ int a[4][3],b[3][4],i,j;
for(i=0; i<4; i++)
{ for(j=0; j<3; j++)
scanf("%d",&a[i][j]);
}
for(i=0; i<4; i++)
{
printf("\n");
for(j=0; j<3; j++)
printf("%5d ",a[i][j]);
}
for(i=0; i<4; i++)
{
for(j=0; j<3; j++)
b[j][i]=a[i][j];
}
printf("\n");
for(i=0; i<3; i++)
{
printf("\n");
for(j=0; j<4; j++)
printf("%5d ",b[i][j]);