Question

C语言编程！ 问1:输入2个整数，计算并输出它们的和、差、积、商。(输入、输出要有必要的提示)

输入一个字符ch，然后输出与它前后相邻的2个字符。

Answer 1

没事做，帮你写一下吧
#include<stdio.h>
int main()
{
int a,b;
printf("请输入两个整数：\n");
scanf("%d%d",&a,&b);
printf("和：%d\n差：%d\n积：%d\n商：%d\n",a+b,a-b,a*b,a/b);
return 0;
}

Answer 2

#include "stdio.h"
void main()
{
int i,j,temp;
int a[5];
printf("请输入各成绩：\n");
for(i=0;i<5;i++)
scanf("%d",&a[i]);
for(i=0;i<5;i++)
for(j=i+1;j<5;j++)
{
if(a[i]<a[j])
{
temp=a[j];a[j]=a[i];a[i]=temp;
}
}
for(i=0;i<5;i++)
printf("%d,",a[i]);
}

Answer 3

#include "stdio.h"
main(){
int a,b;
printf("Please input two numbers:\n");
scanf("%d,%d",&a,&b); /*输入的数用逗号隔开*/
printf("a + b = %d\n",a + b);
printf("a - b = %d\n",a - b);
printf("a * b = %d\n",a * b);
printf("a / b = %d\n",a / b);
getch();
}

#include "stdio.h"
main(){
char ch;
int gewei;
printf("Please a char:\n");
scanf("%c",&ch);
printf("%c,%c",ch-1,ch+1);
getch();
}

Answer 4

#include<stdio.h>
int main()
{
char ch;
scanf("%c",&ch);
if(ch=='a'||ch=='A')
printf("%c\n",ch+1);
else
printf("%c\t%c\n",ch+1,ch-1);
return 0;
}
1题
#include "stdio.h"
main(){
float a,b;
scanf("%f%f",&a,&b);
printf("%f+%f=%f\n",a,b,a+b);
printf("%f×%f=%f\n",a,b,a*b);
printf("%f÷%f=%f\n",a,b,a/b);
return 0;}