计算两直线夹角余弦值c++

#includeiostream#includecmathusingnamespacestd;intmain(){doubles1[3],s2[3],s,a,b;coutÊäÈëÖ±ÏßL1µÄ·½ÏòÏòÁ¿:endl;cins1[0]s1[1]s1[2];coutÇëÊäÈëÖ±ÏßL2µÄ·½ÏòÏòÁ¿:endl;cins2[0]s2[1]s2[2];a=abs(s1[0]*s2[0]+s1[1]*s2[1]+s1[2]*s2[2]);b=sqrt(s1[0]*s1[0]+s1[1]*s1[1]+s1[2]*s1[2])*sqrt(s2[0]*s2[0]+s2[1]*s2[1]+s2[2]*s2[2]);s=a/b;coutÁ½Ö±ÏߵļнÇÓàÏÒֵΪ:sendl;system(pause);return0;}