vector 二维数组,二维vector赋值

# include iostream # includevectorvoidmain ({ inta=2； int b=4； //初始化方法1//STD :3360 vectors TD :3360 vectorintvec (a，STD33603360vectorint ) b )； //2行4vectorvectorint (bvec(a，vectorint ) b )； int m=vec.size (； //实际行中的元素数int n=vec[0].size (； //实际列的元素数}

//初始化方法2//STD :3360 vectors TD 33603360 vectorintvec1=STD : vector int (a，STD 3360: vector vector

//初始化方法3//STD :3360 vectors TD 33603360 vectorintvec2=STD : vector int (a，STD 3360: vector vector