#include<stdio.h>

#include<Windows.h>


int main(void)


{

double operand1,operand2,result;

char selected_operator;

int retry;


do

{

retry=0;

printf("원하시는 계산을 적으십시오.\n");

scanf("%lf%c%lf",&operand1,&selected_operator,&operand2);

if(selected_operator==43)

result=operand1+operand2;

else if(selected_operator==45)

result=operand1-operand2;

else if(selected_operator==42)

result=operand1*operand2;


else if(selected_operator==47)

result=operand1/operand2;

else

{

printf("잘못입력하셨습니다\n");

retry=1;

}

}while(retry==1);

printf("%g %c %g = %f\n",operand1,selected_operator,operand2,result);

printf("안녕히가십시오\n");

system("pause");

return 0;

}