C程序设计Week12晚上练习
本周仅仅进行一个程序，曾经的一个程序。
自己定义例如以下函数，输入n(n<46)个学生的姓名和成绩，顺序输出这n个学生的姓名和成绩，并输出最高成绩的姓名和成绩。预习struct结构体，思考怎样改进这一程序。
//为count个学生输入姓名和成绩 void getStudentsInfo(char names[][20], int scores[] , int count); void getStudentsInfo(char* names[], int scores[] , int count); //依次打印count个学生的姓名和成绩 void printStudentsInfo(char* names[], int scores[],int count); //获取最高成绩的学生的index int getIndexOfMaxScore(int scores[],int count);
知识点：
1 字符串数组用于处理多个人的姓名
2 数组作为函数的參数
the core code:
/* Note:Your choice is C IDE */
#include "stdio.h"
void inputStudents(char name[][20],int score[],int num);
void outputStudents(char name[][20],int score[],int num);
main()
{
char name[45][20];
int score[45];
inputStudents(name,score,2);
outputStudents(name,score,2);
}
void inputStudents(char name[][20],int score[],int num){
int i ;
for(i=0;i<num;i++)
scanf("%s %d",name[i],&score[i]);
}
void outputStudents(char name[][20],int score[],int num){
int i ;
for(i=0;i<num;i++)
printf("%s %d",name[i],score[i]);
}
an example :
/* Note:Your choice is C IDE */
#include "stdio.h"
#define N 45
int inputSS(char names[][20],int score[],int num);
void printSS(char names[][20],int score[],int num);
void getMAX(char names[][20],int score[],int num);
main()
{
char names[N][20];
int score[N];
int num=0;
int choose;
printf("What do you want to do: INPUT(1),OUTPUT(2),MAX(3),EXIT(0):");
scanf("%d",&choose);
do{
switch(choose){
case 1:
num = inputSS(names,score,num);
break;
case 2:
printSS(names,score,num);
break;
case 3:
getMAX(names,score,num);
}
printf("\nWhat do you want to do: INPUT(1),OUTPUT(2),MAX(3),EXIT(0):");
scanf("%d",&choose);
}while(choose != 0);
}
int inputSS(char names[][20],int score[],int num){
int n,i;
printf("\nThis Time, How many students do you want to input :");
scanf("%d",&n);
if((n+num)>N || n <1){
printf("not valid sum\n");
return -1;
}
printf("NOW INPUT AS ( NAME SCORE ):\n");
for(i=0;i<n;i++){
printf("%d. ",i);
scanf("%s %d",&names[i+num],&score[i+num]);
}
printf("THIS TIME , INPUT IS OVER\n");
return num+n;
}
void printSS(char names[][20],int score[],int num){
int i ;
if(num==0) {
printf("NO STUDENTS NOW\n");
return;
}
printf("\nNOW , THE STUDENTS SCORES AS FOLLOWS \n");
for(i = 0 ;i<num;i++)
printf("%2d. name:%10s score:%3d\n",i,names[i],score[i]);
}
void getMAX(char names[][20],int score[],int num){
int i ,max_index,max_score;
if(num==0) {
printf("NO STUDENTS NOW\n");
return;
}
max_index=0;
max_score=score[0];
for(i = 1 ;i<num;i++)
if( score[i] > max_score ){
max_score = score[i];
max_index = i;
}
printf("The Top Score is %d by %s \n",score[max_index],names[max_index]);
}=====================华丽的切割线====================================================
有非常多知识点须要大家复习。以下是一些比較cute的程序。弄懂啊弄懂
//0
#include "stdio.h"
void main(){
int i=0, a[]={3,4,5,4,3};
do
{
a[i]++;
}while(a[++i]<5);
for(i=0;i<5;i++)
printf("%d",a[i]) ;
}
//1
#include "stdio.h"
void main(){
int a = 7;
int b = 8;
printf ( "a&b = %d\n",a&b);
printf( "a&&b = %d\n",a&&b);
}
//2
#include "stdio.h"
void main(){
int i ;
for(int i = 0; i<4; i++){
if( i==2)
break;
printf("%d ",i);
}
printf("\n");
for(int i = 0; i<4; i++){
if( i==2)
continue;
printf("%d ",i);
}
printf("\n");
}
//3
#include "stdio.h"
void main(){
int sum=0,item=0;
while(item<7){
item++;
sum+=item;
if(sum==7)
break; }
printf("%d\n",sum);
}
//4
#include "stdio.h"
void main(){
int a[]={1,2,3,4,5,6,7,8};
int i,x ,*p;
x=1;
p=&a[3];
for( i=0; i<3; i++ )
x *= *(p+i);
printf("x=%d\n",x);
}
//5
#include "stdio.h"
void main(){
int i=5,x=1;
for(;i<5;i++) x=x+1;
printf("%d\n",x);
}
//6
#include "stdio.h"
void main(){
int x,y;
for (x=0, y=0 ; (y!=123) &&(x<4); x++)
y++;
printf("x=%d,y=%d\n",x,y);
}
//7
#include "stdio.h"
void main(){
int a[7]={3,4,5,6,7,8,9};
int *p,*q;
int i,x;
p=&a[0];
q=&a[6];
for (i=0;i<3;i++)
if(*(p+i)==*(q-i) )
x=*(p+i)*2;
}
//8
#include "stdio.h"
void main(){
int a[5][5];
printf("&a[3][2]-a=%d\n",&a[3][2]-a);
}
//9
#include "stdio.h"
void main(){
int i=2,n=2;
for(;i<5;i++){
continue;
n=n+i;
}
printf("%d\n",n);
}
