我是初学者,我正在学习C和C.我试图在Visual Studio 2012 Express for
Windows桌面中运行此代码.这是一个简单的计算器代码,我自己写的！但每当我运行它时,我得到此错误在Calculator.exe中0x519600B4(msvcr110d.dll)的未处理异常：0xC0000005：访问冲突写入位置0x00000000.
请原谅我的任何错误(这是我的第一次).谢谢！
#include<stdio.h>
#include<conio.h>
main ()
{
int num1,num2,result;
char oper;
scanf_s("%d%c%d",&num1,&oper,&num2);
switch(oper)
{
case '+':
result = num1 + num2;
printf("%d",result);
break;
case '-':
result = num1 - num2;
printf("%d",result);
break;
case '*':
result = num1 * num2;
printf("%d",result);
break;
case '/':
result = num1 / num2;
printf("%d",result);
break;
default:
printf("ERROR: INVALID OR UNRECOGNISED INPUT\n");
break;
}
_getch();
}
解决方法
使用
scanf_s时,对于％c格式字符串,您必须指定要读取的字符数：
scanf_s("%d%c%d",1,&num2);
documentation描述了要求：
Unlike scanf and wscanf,scanf_s and wscanf_s require the buffer size to be specified for all input parameters of type c,C,s,S,or string control sets that are enclosed in []. The buffer size in characters is passed as an additional parameter immediately following the pointer to the buffer or variable.