View Compilation Error

0_0_13788777_8984\Main.java:23: 错误: 需要')'
					s+=(x[i]*y[j]-x[j]y[i])/2.0;
					                  ^
0_0_13788777_8984\Main.java:23: 错误: 非法的表达式开始
					s+=(x[i]*y[j]-x[j]y[i])/2.0;
					                   ^
0_0_13788777_8984\Main.java:23: 错误: 需要';'
					s+=(x[i]*y[j]-x[j]y[i])/2.0;
					                     ^
3 个错误