2017实验9 结构程序设计

6-1 计算两个复数之积（15 分）
struct complex multiply(struct complex x, struct complex y){  
  
    struct complex z;  
  
    z.real = x.real * y.real - x.imag * y.imag;  
    z.imag = x.real * y.imag + x.imag * y.real;  
  
    return z;  
  
}  

6-2 按等级统计学生成绩（20 分）

int set_grade( struct student *p, int n ){
    int count=0;            
     for(int i=0;i<n;i++,p++){
        if(p->score<=100&&p->score>=85){
            p->grade='A';
         }else if(p->score<=84&&p->score>=70){
            p->grade='B';   
         }else if(p->score<=69&&p->score>=60){
            p->grade='C';   
         }else if(p->score<60){
            p->grade='D';   
            count++;
         }
     }
     return count;
} 

7-1 计算职工工资（15 分）
#include<stdio.h>
struct staff{
    char name[11];
    double jbgz; 
    double fdgz;
    double zc;
    double sfgz;
};
void input(struct staff s[],int n);
void output(struct staff s[],int n);
int main(void){
    int n;
    scanf("%d",&n);
    struct staff s[n];
    input(s,n);
    output(s,n);
    return 0;
}

void input(struct staff s[],int n){
    for(int i=0;i<n;i++){
        scanf("%s %lf %lf %lf",s[i].name,&s[i].jbgz,&s[i].fdgz,&s[i].zc);
    }
}
void output(struct staff s[],int n){
    for(int i=0;i<n;i++){
            s[i].sfgz=s[i].jbgz+s[i].fdgz-s[i].zc;
            printf("%s %.2lf\n",s[i].name,s[i].sfgz);
    }
}

7-2 时间换算（15 分）
#include<stdio.h>
struct time{
    int hh;
    int mm;
    int ss;
    int s_ss;
};
int main(void){
    struct time t;
    scanf("%d:%d:%d",&t.hh,&t.mm,&t.ss);
    scanf("%d",&t.s_ss);
     
    if(t.ss+t.s_ss<60){
        t.ss+=t.s_ss;
    }else if(t.ss+t.s_ss>=60){
        t.ss=t.ss+t.s_ss-60;
        if(t.mm==59){
            t.mm=0;
            if(t.hh==23){
                t.hh=0;
            }else{
                t.hh+=1;
            }
        }else{
            t.mm+=1;
        }
    }
    
    printf("%02d:%02d:%02d",t.hh,t.mm,t.ss);
    return 0;
}

7-3 计算平均成绩（15 分）
#include<stdio.h>
struct students{
    char xh[6];
    char name[11];
    int score;
};
void input(struct students s[],int n);
void output(struct students s[],int n);
int main(void){
    int n;
    scanf("%d",&n);
    struct students s[n];
    input(s,n);
    output(s,n);
    return 0;
}

void input(struct students s[],int n){
    for(int i=0;i<n;i++){
        scanf("%s %s %d",s[i].xh,s[i].name,&s[i].score);
    }
}
void output(struct students s[],int n){
    double avg=0,sum=0;
    for(int i=0;i<n;i++){
            sum+=s[i].score;
            
    }
    avg=sum/n;
    printf("%.2lf\n",avg);
    for(int i=0;i<n;i++){
            if(s[i].score<avg){
                printf("%s %s\n",s[i].name,s[i].xh);
            }
            
    }
    
}

7-4 查找书籍（20 分）
#include<stdio.h>
#include<string.h>
struct book{
    char book_name[31];
    double cost; 
    
};

int main(void){
    int n;
    scanf("%d",&n);
    struct book b[9];   
    int max_index=0,min_index=0;
    for(int i=0;i<n;i++){
            getchar();
        gets(b[i].book_name);
        scanf("%lf",&b[i].cost);
        if(b[max_index].cost<b[i].cost){
            max_index=i;
        }
        if(b[min_index].cost>b[i].cost){
            min_index=i;
        }
    }

    printf("%.2f, %s\n",b[max_index].cost,b[max_index].book_name);
    printf("%.2f, %s",b[min_index].cost,b[min_index].book_name);    
    
    
    
    return 0;
}

7-5 有理数比较（10 分）
#include<stdio.h>
#include<math.h>
struct xl{
    double x;
    double y;
};

int main(void){
    struct xl v1;
    struct xl v2;
    double x,y;
    scanf("%lf/%lf",&v1.x,&v1.y);
    scanf("%lf/%lf",&v2.x,&v2.y);
    if(v1.x/v1.y>v2.x/v2.y){
            printf("%.0lf/%.0lf > %.0lf/%.0lf",v1.x,v1.y,v2.x,v2.y);
    }else if(v1.x/v1.y==v2.x/v2.y){
            printf("%.0lf/%.0lf = %.0lf/%.0lf",v1.x,v1.y,v2.x,v2.y);
    } else if(v1.x/v1.y<v2.x/v2.y){
            printf("%.0lf/%.0lf < %.0lf/%.0lf",v1.x,v1.y,v2.x,v2.y);
    }
    
    

    return 0;
}

7-6 平面向量加法（15 分）
#include<stdio.h>
#include<math.h>
struct xl{
    double x;
    double y;
};

int main(void){
    struct xl v1;
    struct xl v2;
    double x,y;
    scanf("%lf%lf",&v1.x,&v1.y);
    scanf("%lf%lf",&v2.x,&v2.y);
    x=v1.x+v2.x;
    y=v1.y+v2.y;
if(x > -0.05 && x < 0.05) {          
         x = 0.0; 
     }
     if(y > -0.05 && y < 0.05) {
         y = 0.0;
     } 
    
    printf("(%.1lf, %.1lf)",x,y);
    return 0;
}