大数高精运算总结 ：方法类似于加法 除了这里 s[i+j]+=s1[i]*s2[j] 注意格式的控制 这里得开两个数组-High-precision computation of large numbers sum up: This method is similar to here except adder s [i+ J]+ = S1 [i]* s2 [j] attention to the control of the format was opened here two arra