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This article mainly explains "how to use solidity's twoarray". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use solidity's twoarray.

Two-dimensional array definition 1

Uint [2] [3] grade = [60, 80], [40, 20], [50, 50]]

Returns the two-dimensional array 1

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Function getGrade () view public returns (uint [2] [3]) {

Return grade

}

Get two-dimensional array length 1

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Function getLength () view public returns (uint) {

Return grade.length

}

Function getLength3 () view public returns (uint) {

Return grade [0] .length

}

Change content 1

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Function changeContent () public {

Grade [0] [1] = 100

/ / grade.push (ericGrade)

/ / grade [0] [2] = 90

}

Complete code demo 1

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Pragma solidity ^ 0.4.23

Contract twoArray {

/ / uint [2] jonsongrade = [60BZ 80]

Uint [2] ericGrade = [40BZ 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

}

/ / get the content and sum

Function add () view public returns (uint) {

Uint sum = 0

/ / there are some differences between defining and obtaining data. When obtaining data, the first number I represents the iSecret1 element, and the second data j represents the j + 1 content within the iTunes 1 element.

/ / 1, I = 0 I

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