问题遇到的现象和发生背景
环境是Visual Studio Community最新版的
问题相关代码,请勿粘贴截图
#include<stdio.h>
#define PI 3.14
int main()
{
float r,area;
printf("请输入半径:");
scanf("%f", &r);
area =PI* r * r;
printf("面积为:%f.\n", area);
return 0;
}
运行结果及报错内容
1>D:\Visual Studio Community G\Project_Lzi\Project_Lzi\program2_1.c(11,14): warning C4244: “=”: 从“double”转换到“float”,可能丢失数据
1>D:\Visual Studio Community G\Project_Lzi\Project_Lzi\program2_1.c(10,2): error C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
我的解答思路和尝试过的方法
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