c语言中用反函数表示角度

头文件 math.h反3角函数有 acos(double),asin(double),atan(double),atan(double,double),返回值 double 型弧度值转角度要 *180.0/3.1416例：#include <stdio.h>#include<stdlib.h>#include<math.h>int main(){double x=0.5;printf("acos=%.2lf degrees\n",acos(x) * 180.0/3.1416); printf("asin=%.2lf degrees\n",asin(x) * 180.0/3.1416); printf("atan=%.2lf degrees\n",atan(x) * 180.0/3.1416); printf("atan2=%.2lf degrees\n",atan2(1.0,2.0) * 180.0/3.1416); return 0;}