簡單計算器（利用函數數組指針）帶圖片

#include<stdio.h>

double add(double a,double b)
{
	return a+b;
}
double sub(double a,double b)
{
	return a-b;
}
double mul(double a,double b)
{
	return a*b;
}
double div(double a,double b)
{
	return a/b;
}
int main()
{

	int input=1;
	double a;
	double b;
	double ret;
	while(input)
{
	double (*fun[])(double a,double b)={0,add,sub,mul,div};//定義函數數組指針
	printf("*******************\n");
	printf("***1 add   2 sub***\n");
	printf("***3 mul   4 div***\n");
	printf("*******************\n");
	scanf("%d",&input);
	printf("plese input\n");
	scanf("%lf,%lf",&a,&b);
	ret = fun[input](a,b);//讀取數組內容
	printf("=%lf\n",ret);
}
	return 0;

}

<img src="https://img-blog.csdn.net/20150329171243273?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvd29kZXNoaWppYW5ocmY=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />