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#include<stdio.h>
main()
{
int a,b;
char hh,mm;
/*定义字符变量op*/
hh=‘+‘;
mm=‘=‘;
scanf("%d",&a);
putchar(hh);
scanf("%d",&b);
putchar(mm);
printf("%d",a+b);
/*整数计算器*/
int y,q;
char m,n;
n=‘=‘;
scanf("%d%c%d",&y,&m,&q);
printf("%c",n);
if(m==‘+‘)
printf("%d\n",y+q);
else if(m==‘-‘)
printf("%d\n",y-q);
else if(m==‘*‘)
printf("%d\n",y*q);
else if(m==‘/‘)
printf("%d\n",y/q);
int month;
printf("please input month\n");
scanf("%d",&month);
switch(month)
{
case 1:printf("january\n");break;
case 2:printf("february\n");break;
case 3:printf("march\n");break;
case 4:printf("april\n");break;
case 5:printf("may\n");break;
case 6:printf("jun\n");break;
case 7:printf("july\n");break;
case 8:printf("august\n");break;
case 9:printf("september\n");break;
case 10:printf("octomber\n");break;
case 11:printf("november\n");break;
case 12:printf("december\n");break;
}
int shuru,chengji;
scanf("%d",&shuru);
chengji=shuru/10;
switch(chengji)
{
case 10:
case 9:printf("A\n");break;
case 8:printf("B\n");break;
case 7:printf("C\n");break;
case 6:printf("D\n");break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:printf("E\n");break;
}
/*SWITCH计算器*/
int qq,ee;
char ww,tt;
tt=‘=‘;
scanf("%d%c%d",&qq,&ww,&ee);
switch(ww)
{
case ‘+‘:printf("%c%d",tt,qq+ee);break;
case ‘-‘:printf("%c%d",tt,qq-ee);break;
case ‘*‘:printf("%c%d",tt,qq*ee);break;
case ‘/‘:printf("%c%d",tt,qq/ee);break;
}
}/*今天这个网络真是醉了！！！！一发布就没了，害的我写了四边！！！！！！！！！！！！！！！！！！！！！*/
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原文地址：http://www.cnblogs.com/haogong10333/p/4896373.html
