第三章 事例

第三章 例子

#include<stdio.h>
int main(){
???
??? double number1 = 0.0 ;
??? double number2 = 0.0 ;

??? char op = 0 ;

??? printf(" \n Enter the calculation\n");
??? scanf("? %lf , %c,? %lf",&number1,&op,&number2);


??? switch(op){
??? case '+' :
??? ??? printf("= %lf \n",number1 + number2);
??? ??? break ;
??? case '-' :
??? ??? printf("= %lf \n",number1 - number2);
??? ??? break ;
??? case '*' :
??? ??? printf("= %lf \n",number1 * number2);
??? ??? break ;
??? case '/':
??? ??? if(number2 == 0){
??? ??? ??? printf(" your can't input the zero to /");
??? ??? }else{
??? ??? ??? printf("= %lf \n",number1 / number2);
??? ??? }
??? ??? break ;
??? case '%' :
??? ??? ??? if(number2 == 0){
??? ??? ??? ??? printf(" your can't input the zero to %");
??? ??? ??? }else{
??? ??? ??? ??? printf( " = %ld \n",(long)number1 % (long)number2);
??? ??? ??? }
??? ??? ??? break;
??? default :
??? ??? printf(" your have input an error expriese ! ");
??? ??? break ;
??? }
??? return 0 ;
???
}