How to use twoarray of solidity
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
