c语言简单计算器程序编写
时间: 2024-11-24 15:06:51 浏览: 112
在C语言中,编写一个简单的计算器程序可以分为以下几个步骤:
1. 定义函数:你可以创建两个函数,一个是用于加法运算,另一个是用于减法运算。例如:
```c
int add(int a, int b) {
return a + b;
}
int subtract(int a, int b) {
return a - b;
}
```
2. 用户输入:设计一个主函数,让用户输入操作数和选择的操作符(如+、-):
```c
#include <stdio.h>
int main() {
int num1, num2;
char operator;
printf("请输入第一个数字:");
scanf("%d", &num1);
printf("请输入第二个数字:");
scanf("%d", &num2);
printf("请选择操作符 (+ 或 -): ");
scanf(" %c", &operator); // 注意添加空格防止干扰
switch (operator) {
case '+':
printf("结果是:%d\n", add(num1, num2));
break;
case '-':
printf("结果是:%d\n", subtract(num1, num2));
break;
default:
printf("无效的操作符!\n");
}
return 0;
}
```
3. 错误处理:为了增加程序的健壮性,可以在用户输入非有效操作符时给出错误提示。
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