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| pragma solidity ^0.4.23;
contract twoArray{ // uint[2] jonsongrade = [60,80];
uint[2] ericGrade = [40,20];
// uint[2] stevenGrade = [50,50];
uint[2][3] grade = [[60,80],[40,20],[50,50]];
function getGrade() view public returns(uint[2][3]){
return grade; }
function getLength() view public returns(uint){
return grade.length; }
function getLength3() view public returns(uint){
return grade[0].length; }
// function changelength() public {
// grade[0].length =10; // }
function changeContent() public {
grade[0][1] = 100;
// grade.push(ericGrade); // grade[0][2]=90; }
//获取内容并求和 function add() view public returns(uint){ uint sum = 0; //定义的时候和获取数据的时候有些差别,在获取数据的时候,第一个数字i代表的是i+1元素,第二个数据j代表的是i+1个元素内的第j+1个内容 //1、 i = 0 i<3 //2、j=0 j <2 //3、sum += grade[0][0];、sum += 60; //4、j++---->j=1; //5.j<2? //6.sum+=grade[0][1];sum += 80 //7.j++------j=2; //8.j<2 //9.i++ --->i=1; //10.i<3 //11.j = 0 //12.j<2? //13.sum += grade[1][0] //14.j++ //15......... //最后遍历了grade[0][0],grade[0][1],grade[1][0],grade[1][1],grade[2][0],grade[2][1] for(uint i = 0;i<3;i++){ for(uint j = 0;j<2;j++){ sum+= grade[i][j]; } } return sum; }
}
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