第二次作业

#include<stdio.h>
main(){
    int a=3;
    int b=4;
    printf("%d %d\n",a,b);
}

 

#include<stdio.h>
main(){
    float a=7;
    double b=8;
    printf("%f %lf\n",a,b);
}

 

#include<stdio.h>
main(){
    char c1='R';
    printf("%c--%d\n",c1,c1);
}

 

#include<stdio.h>
main(){
    int a=6;
    float b=7.68;
    printf("%d\n",a+(int)b);
}

 

#include<stdio.h>
main(){
    int a=8;
    int b=5;
    int c;
    printf("交换前分别是%d %d\n",a,b);
    c=a;
    a=b;
    b=c;
    printf("交换后分别是%d %d\n",a,b);
}

 

#include<stdio.h>
main(){
    int chang,kuan,zhouchang,mianji;
    printf("请输入长和宽，空格以区分");
    scanf("%d%d",&chang,&kuan);
    zhouchang=(chang+kuan)*2;
    mianji=chang*kuan;
    printf("周长是%d,面积是%d",zhouchang,mianji);
}

 

#include<stdio.h>
main(){
    double danjia,zongjia,zhifu,zhaoling,zhekou;
    int shuliang,moling;
    printf("请输入商品单价");
    scanf("%lf",&danjia);
    printf("请输入商品数量");
    scanf("%d",&shuliang);
    zongjia=danjia*shuliang;
    printf("消费总金额为%.1lf\n",zongjia);
    printf("请输入折扣");
    scanf("%lf",&zhekou);
    moling=(int)(zongjia*zhekou);
    printf("最终应付款%d",moling);
    printf("请输入付款金额");
    scanf("%lf",&zhifu);
    zhaoling=zhifu-moling;
    printf("尊敬的顾客，您付款%lf元，找零%lf元",zhifu,zhaoling);
}