For reference only 、 For reference only 、 For reference only （ Tidy up your freshman C Exercises for each chapter of the language 、 No problem 、 Only the program ）

1 、 Training name

Practical training 7: Array

2 、 Training objectives and requirements

The experiment purpose ：
1、 Master one-dimensional array , Two dimensional array , Definition of character array 、 assignment 、 Input 、 Output method
2 、 Master one-dimensional array , Two dimensional array , Use of character arrays
3 、 Master the algorithms related to arrays through computer practice

3 、 Source code and running screenshot

【6-6】
（1）

#include<stdio.h>
int main (){
int i=0, j,a[10],temp;
  printf(" Please enter ten integers ：\n");
    for(int i=0;i<10;i++){
    	    scanf("%d ",&a[i]);// Get the integer from the keyboard 
	}
// Bubble sort 
	   for(int i=0;i<9;i++){
    	for(int j=0;j<10-i;j++){
    		if(a[j]>a[j+1])
    		{
    			temp=a[j+1];
    			a[j+1]=a[j];
    			a[j]=temp;
			}
		}
	}

for(int i=0;i<10;i++){
	printf("%d\n",a[i]);

}
	return 0;
 }

（2）、

#include<stdio.h>
int main (){
	int a1,b2,c3,d4,e5,f6,g7,h8,i9,g10,k11,l12,sum=0; 
   a1=4;// January  
    printf("1 Monthly output ：%d\n",a1);
   b2=(a1-1)*2; 
   printf("2 Monthly output ：%d\n",b2);
   c3= (b2-1)*2;
    printf("3 Monthly output ：%d\n",c3);
   d4=(c3-1)*2;
    printf("4 Monthly output ：%d\n",d4);
   e5= (d4-1)*2;
    printf("5 Monthly output ：%d\n",e5);
   f6=(e5-1)*2;
    printf("6 Monthly output ：%d\n",f6);
   g7= (f6-1)*2;
    printf("7 Monthly output ：%d\n",g7);
   h8=(g7-1)*2;
    printf("8 Monthly output ：%d\n",h8);
   i9=(h8-1)*2;
    printf("9 Monthly output ：%d\n",i9);
   g10=(i9-1)*2; 
    printf("10 Monthly output ：%d\n",g10);
   k11=(g10-1)*2;
    printf("11 Monthly output ：%d\n",k11);
   l12=(k11-1)*2;
    printf("12 Monthly output ：%d\n",l12);
    sum=a1+b2+c3+d4+e5+f6+g7+h8+i9+g10+k11+l12;
    printf(" Total output ：%d\n",sum);
	return 0;
 }

（4）、

#define N 50
#include<stdio.h>
int main (){
 int i,n ,a,count;
 for(n=1;n<N;n+=2){
 	
 	for(i=0;i<n;i++){
 		count++;
 		if(count==40)
 			 printf(" The fortieth data ：%d\n",n);
	 }	
 	 }
 
	return 0;
 }

（5）、

#include<stdio.h>
int main (){
	int i,j, b;
int sum=0,f[3][4];
// Keyboard input two-dimensional array  
for(i=0;i<3;i++){
	printf(" Please enter four data ：\n");
	for(j=0;j<4;j++){
		
		scanf("%d",&f[i][j]);
		printf("\n");
	}
}
for(i=0;i<3;i++){
	sum+=f[i][1];
}
printf(" The sum of the second column is %d",sum);
	return 0;
 }

（6）、

#include<stdio.h>
int main (){
	int i,j, b;
int sum=0,sum1=0,sum2=0,sum3=0,sum4=0,f[4][5];

// Keyboard input two-dimensional array  
for(i=0;i<4;i++){
	printf(" The first %d Line five elements ：\n",i+1); 
	for(j=0;j<5;j++){
		
		scanf("%d",&f[i][j]);
	}
}
for(j=0;j<5;j++){
	
	sum1=sum1+f[0][j];
}
printf(" The first line and ：%d\n",sum1);

for(j=0;j<5;j++){

	sum2+=f[3][j];
}

printf(" The fourth line and ：%d\n",sum2);
for(i=1;i<3;i++){

	sum3+=f[i][0];
}
printf(" The first column and ：%d\n",sum3);
for(i=1;i<3;i++){

	sum4+=f[i][4];
}
printf(" The fifth column and ：%d\n",sum4);

sum=sum1+sum2+sum3+sum4;
printf(" Edge and yes %d",sum);

	return 0;
 }

（7）、

#include<stdio.h>
int main (){
	int t,i,j;
    int f[3][4];
    int a,b,max; 

// Keyboard input two-dimensional array  
for(i=0;i<3;i++){
	printf(" The first %d Line four elements ：\n",i+1); 
	for(j=0;j<4;j++){	
		scanf("%d",&f[i][j]);
	}
}
    printf("\n");
     max=f[0][0];
for(i=0;i<3;i++){
	for(j=0;j<4;j++){
		printf("%3d",f[i][j]);
		if(f[i][j]>max){
			max=f[i][j];
			a=i;
			b=j;		
		}
	}printf("\n");

}

printf("%d,%d\n",a,b);


printf(" The maximum value of the output array :%d\n",max);

	return 0;
 }

（8）、

#include<stdio.h>
int main (){
	int t,i,j;
    int a[3][3];
    int b[3][3];
// Keyboard input two-dimensional array  
for(i=0;i<3;i++){
	printf(" The first %d Line three elements ：\n",i+1); 
	for(j=0;j<3;j++){	
		scanf("%d",&a[i][j]);
	}
}
printf(" Array a：\n");
for(i=0;i<3;i++){
	for(j=0;j<3;j++){
		printf("%-4d",a[i][j]);
	}
		printf("\n");
}
printf("\n");
printf("\n");
for(i=0;i<3;i++){
	printf(" The first %d Line three elements ：\n",i+1); 
	for(j=0;j<3;j++){	
		scanf("%d",&b[i][j]);
	}
	
}
printf(" Array b：\n");
for(i=0;i<3;i++){
	for(j=0;j<3;j++){
		printf("%-4d",b[i][j]);
	
	}
		printf("\n");
}
printf(" Array a And an array b The result of the addition is in the array c Show in \n");
for(i=0;i<3;i++){
	for(j=0;j<3;j++){
	printf("%-4d",a[i][j]+b[i][j]);
	}	printf("\n");
}


	return 0;
 }

4、 Summary

Through this exercise, I can skillfully master the structure of arrays and some simple applications , The implementation of one-dimensional array is relatively simple 、 Two dimensional arrays are relatively complex . When dynamically outputting a two-dimensional array, you need to use a two-layer loop to assign values to the array . The output and input of two-dimensional array mainly involve two layers for Loop to output and input the values of each row and column in the array . Using arrays can achieve a simple sorting method , The principle of bubble sorting is to exchange two adjacent numbers through two-layer circulation , Keep comparing, and finally realize a sequential number table .