[说明] 以下程序的功能是统计学生成绩，包括输入学生的姓名和成绩，按成绩从高到低排列打印输出，对前百分之七十的学生定为合格(PASS)，而后百分之三十的学生定为不合格(FAIL)。例如，当输入4名学生的姓名和成绩“Alice 67 Mary 90 Tom 56 John 88”后，程序的执行结果如下： 姓名 成绩 合格否 Mary 90 PASS John 88 PASS Alice 67 FAIL Tom 56 FAIL[C++程序]#include ＜stdio.h＞#include ＜string.h＞#define N 10class student{ protected: char name[10]; int deg; public:void setname(charna[]) {strcpy(name,na);}char * getname() {return name;}void setdeg(int d) {deg= d;}int getdeg(){return deg;}};class compute{ int ns; student na[N]; public:void getdata();void sort();void disp();};void compute::getdata(){ int i,tdeg; char tname[10]; printf("输入学生人数:"); scanf("%d",&ns); printf("输入学生姓名和成绩:\n"); for(i=0;i＜ns;i+ +){scanf("%s%d",tname,&tdeg);(1) ;na[i].setdeg(tdeg); }}void compute::sort(){ int i,j,pick; (2) ; for(i=0;i＜ns-1;i+ +){pick=i;for(j=i+1;j＜ns;j+ +) if(na[j].getdeg()＞na[pick].getdeg()) (3) ;temp=na[i];na[i]=na[pick];na[pick]=temp; }}void compute::disp(){ int cutoff,i; printf("RESULT\n"); printf("姓名 成绩 合格否\n"); cutoff=ns*7/10-1; for(i=0;i＜ns;i+ +) {printf("%-6s%3d", (4) );if( (5) ) printf("\tPASS\n");else printf("\tFAIL\n");void main(){ compute obj; obj.getdata(); obj.sort(); obj.disp();}
