设数组a[0．n-1,0．．m-1](n>1，m>1)中的元素以行为主序存放，每个元素占用4个存储单元，则数组元素a[i,j](0≤i＜n，0≤j＜m)的存储位置相对于数组空间首地址的偏移量为 （ ）。
- A.(j*m+i)*4
- B.(i*m+j)*4
- C.(j*n+i)*4
- D.(i*n+j)*4
正确答案及解析
正确答案
解析
此题考查数组计算的基础，出自《程序员教程（第四版）》，全书第293页。a[n,m]表示有n行m列，a[I,j]表示是数组中的第i行第j列，用excel中的单元格来理解最方便了，第i行j列相对第一个元素是偏移了i*m个再加上j个位置，每个位置占用4个存储单元，所以是(i*m+j)*4。
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