c语言窗体简易计算器代码

以下是一个使用 C 语言实现简易计算器的例子，它可以在控制台中进行加、减、乘、除四种运算：

#include <stdio.h>

int main() {
    char operator;
    double num1, num2, result;

    printf("Enter an operator (+, -, *, /): ");
    scanf("%c", &operator);

    printf("Enter two operands: ");
    scanf("%lf %lf", &num1, &num2);

    switch(operator) {
        case '+':
            result = num1 + num2;
            break;
        case '-':
            result = num1 - num2;
            break;
        case '*':
            result = num1 * num2;
            break;
        case '/':
            result = num1 / num2;
            break;
        default:
            printf("Error! Invalid operator.");
            return 1;
    }

    printf("%.2lf %c %.2lf = %.2lf", num1, operator, num2, result);
    return 0;
}