PROGRAMMING:Matrix diagonal summation
Experiment 5: array
The purpose of this study was to investigate the effects of different factors on the quality of life
1. Master the definition, assignment, input and output methods of one-dimensional array and two-dimensional array.
2. Master the use of character array and string function.
Title Description
Find an n × The sum of the main diagonal elements of the integer matrix of n.
###Input format:
In the first line, enter the integer n (2 < = n < = 10) to represent n × The integer matrix of N; Enter n × N integers separated by spaces.
###Output format:
The sum of the main diagonal elements of the output matrix.
###Input example:
Here is a set of inputs. For example:
```in
three
1 3 5
6 7 9
2 4 8
```
###Output example:
The corresponding output is given here. For example:
```out
sixteen
```
answer：If there is no answer, please comment
The purpose of this study was to investigate the effects of different factors on the quality of life
1. Master the definition, assignment, input and output methods of one-dimensional array and two-dimensional array.
2. Master the use of character array and string function.
Title Description
Find an n × The sum of the main diagonal elements of the integer matrix of n.
###Input format:
In the first line, enter the integer n (2 < = n < = 10) to represent n × The integer matrix of N; Enter n × N integers separated by spaces.
###Output format:
The sum of the main diagonal elements of the output matrix.
###Input example:
Here is a set of inputs. For example:
```in
three
1 3 5
6 7 9
2 4 8
```
###Output example:
The corresponding output is given here. For example:
```out
sixteen
```
answer：If there is no answer, please comment