动态二维数组定义
uint[][] public grade = [[60,80],[40,20],[50,50]];
获取长度
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function getLength() view public returns(uint){
return grade.length;
}
function getLength3() view public returns(uint){
return grade[0].length;
}
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修改长度
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function changeLength() public{
grade.length = 4;
}
function changeLength3() public{
grade.length =2;
}
function changeLength4() public{
grade[0].length =3;
}
function changeLength5() public{
grade[0].length =1;
}
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添加修改内容
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function changeContent() public{
grade[1][0] = 100;
}
function changeContent2() public{
grade.push([100,90]);
}
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遍历内容
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function add() view public returns(uint){
uint sum = 0;
for(uint i = 0;i<3;i++){
for(uint j = 0;j<2;j++){
sum+= grade[i][j];
}
}
return sum;
}
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本文链接： https://dreamerjonson.com/2018/11/20/solidity-20-dynamictwoarray/
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