C 教程
C 語言實(shí)例 - 實(shí)現(xiàn)簡單的計(jì)算器
C 語言實(shí)例實(shí)現(xiàn)加減乘除計(jì)算。
實(shí)例
# include <stdio.h>
int main() {
char operator;
double firstNumber,secondNumber;
printf("輸入操作符 (+, -, *,): ");
scanf("%c", &operator);
printf("輸入兩個(gè)數(shù)字: ");
scanf("%lf %lf",&firstNumber, &secondNumber);
switch(operator)
{
case '+':
printf("%.1lf + %.1lf = %.1lf",firstNumber, secondNumber, firstNumber + secondNumber);
break;
case '-':
printf("%.1lf - %.1lf = %.1lf",firstNumber, secondNumber, firstNumber - secondNumber);
break;
case '*':
printf("%.1lf * %.1lf = %.1lf",firstNumber, secondNumber, firstNumber * secondNumber);
break;
case '/':
printf("%.1lf / %.1lf = %.1lf",firstNumber, secondNumber, firstNumber / secondNumber);
break;
// operator doesn't match any case constant (+, -, *, /)
default:
printf("Error! operator is not correct");
}
return 0;
}
輸出結(jié)果為：
輸入操作符 (+, -, *,): * 輸入兩個(gè)數(shù)字: 4 5 4.0 * 5.0 = 20.0其他擴(kuò)展