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#include<stdio.h>
#include<conio.h>
float cal(int a,char sym,int b);
main()
{
int a=0,b=0;
char sym='\0';
float c=0.0;
scanf("%d%c%d",&a,&sym,&b);
c=cal(a,sym,b);
printf("%d%c%d=%f\n",a,sym,b);
getch();
}
float cal(int a,char sym,int b)
{
float c=0.0;
switch(sym)
{
case '+': c=a+b;
case '-': c=a-b;
case '*': c=a*b;
case '/': if(b!=0)
{
c=(float)a/b;
return c;
}
else
{
printf("Devided by 0.\n");
exit(0); /*±àÒëµÄʱºòÔÚÕâÐгö´í*/
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