我当前正在创建一个矩阵程序，该程序可以显示带有我们输入的矩阵，矩阵的迹线，从原始矩阵创建2x2矩阵的能力，矩阵的行列式，子矩阵，以及删除矩阵的能力。矩阵中的行和列，这是我的代码：
#include <stdio.h>
struct matrix
{
char name;
int mValues[10][10];
int nrows;
int ncols;
};
struct matrix2
{
char name2;
int mValues2[10][10];
int nrows2;
int ncols2;
};
int main()
{
struct matrix M1, M2;
int trace;
int determinant;
matrixInput(&M1);
matrixDisplay(M1);
matrixTrace(M1, &trace);
printf("\nThe trace of matrix is %d",trace);
return 0;
}
void matrixInput(struct matrix *mat)
{
printf("Please enter a one character name for the matrix, e.g A, B, etc:");
scanf("%c",&(*mat).name);
printf("\nEnter # rows of the matrix(<10):\n");
scanf("%d",&(*mat).nrows);
printf("Enter # columns of the matrix(<10):\n");
scanf("%d",&(*mat).ncols);
printf("\nMatrix %c:\n",(*mat).name);
FILE *file = fopen("matrix.txt","r");
for(int x =0; x < (*mat).nrows; x++) {
for(int y=0; y < (*mat).ncols; y++) {
fscanf(file, "%d", &(*mat).mValues[x][y]);
}
}
fclose(file);
}
void matrixDisplay(struct matrix mat)
{
int baris, kolom;
for(baris = 0; baris < mat.nrows; baris++) {
printf("Row %d: ", baris);
for(kolom = 0; kolom < mat.ncols; kolom++) {
printf("\t%d", mat.mValues[baris][kolom]);
}
printf("\n");
}
getchar();
return;
}
void matrixTrace(struct matrix mat, int *trace)
{
int baris, kolom;
*trace = 0;
for(baris = 0; baris < mat.nrows; baris++){
for(kolom = 0; kolom < mat.ncols; kolom++){
if(baris == kolom){
*trace += mat.mValues[baris][kolom];}
}
}
}
void matrixInput2(struct matrix2 *mat2)
{
printf("Please enter a one character name for the matrix, e.g A, B, etc:");
scanf("%c",&(*mat2).name2);
printf("\nEnter row number to start 2x2 matrix, number needs to be between 0 and 2:\n");
scanf("%d",&(*mat2).nrows2);
printf("Enter column number to start 2x2 matrix, number needs to be between 0 and 2:\n");
scanf("%d",&(*mat2).ncols2);
printf("\nMatrixInput2 %c:\n",(*mat2).name2);
}
这是输出示例：
Please enter a one character name for the matrix, e.g A, B, etc: A
Enter # rows of the matrix(<10):
4
Enter # columns of the matrix(<10):
4
Matrix A:
Row 0: 1 -15 20 -40
Row 1: 41 -60 75 -99
Row 2: 100 -150 2 -14
Row 3: 21 -39 42 -59
The trace of matrix is =116
所以矩阵在.txt文件中被调用，我刚刚完成了矩阵显示和轨迹的创建，现在我想从原始矩阵创建2x2矩阵，但是我不能再次输入？程序在输出后结束，我尝试赋予它void功能，但仍然无法正常工作，任何人都可以帮忙吗？
答案 0 :(得分：1)
现在我解决了我的问题，这是更新的代码：
#include <stdio.h>
struct matrix
{
char name;
int mValues[10][10];
int nrows;
int ncols;
};
struct matrix2
{
char name2;
int mValues2[10][10];
int nrows2;
int ncols2;
};
int main()
{
struct matrix m1, *m2;
int trace;
int determinant;
matrixInput(&m1);
matrixDisplay(m1);
matrixTrace(m1, &trace);
printf("\nThe trace of matrix is %d",trace);
matrixDeterminant(*m2, &determinant);
return 0;
}
void matrixInput(struct matrix *mat, struct matrix2 *mat2)
{
printf("Please enter a one character name for the matrix, e.g A, B, etc:");
scanf("%c",&(*mat).name);
printf("\nEnter # rows of the matrix(<10):\n");
scanf("%d",&(*mat).nrows);
printf("Enter # columns of the matrix(<10):\n");
scanf("%d",&(*mat).ncols);
printf("\nMatrix %c:\n",(*mat).name);
FILE *file = fopen("matrix.txt","r");
for(int x =0; x < (*mat).nrows; x++) {
for(int y=0; y < (*mat).ncols; y++) {
fscanf(file, "%d", &(*mat).mValues[x][y]);
}
}
fclose(file);
}
void matrixDeterminant(struct matrix m1, struct matrix2 *m2,struct matrix2 *mat2, int *determinant)
{
printf("\n\nFinding the determinant now!");
printf("\nPlease enter a one character name for the matrix, e.g A, B, etc:");
scanf("%c",&(*m2).name2);
printf("\nEnter row number where to start 2x2 matrix, number needs to be between 0 and 2:\n");
scanf("%d",&(*m2).nrows2);
printf("Enter column number where to start 2x2 matrix, number needs to be between 0 and 2:\n");
scanf("%d",&(*m2).ncols2);
}
void matrixDisplay(struct matrix mat)
{
int baris, kolom;
for(baris = 0; baris < mat.nrows; baris++) {
printf("Row %d: ", baris);
for(kolom = 0; kolom < mat.ncols; kolom++) {
printf("\t%d", mat.mValues[baris][kolom]);
}
printf("\n");
}
getchar();
return;
}
void matrixTrace(struct matrix mat, int *trace)
{
int baris, kolom;
*trace = 0;
for(baris = 0; baris < mat.nrows; baris++){
for(kolom = 0; kolom < mat.ncols; kolom++){
if(baris == kolom){
*trace += mat.mValues[baris][kolom];}
}
}
}
另一件事是我想从原始矩阵中创建一个2x2矩阵并找到该矩阵的行列式，该矩阵是从我创建的txt文件中调用的，我很困惑，接下来我应该键入什么？
我希望输出如下：
Please enter a one character name for the matrix, e.g A, B, etc: A
Enter # rows of the matrix(<10):
4
Enter # columns of the matrix(<10):
4
Matrix A:
Row 0: 1 -15 20 -40
Row 1: 41 -60 75 -99
Row 2: 100 -150 2 -14
Row 3: 21 -39 42 -59
The trace of matrix is =116
Finding the determinant now!
Please enter a one character name for the matrix, e.g A, B, etc: B
Enter row number where to start 2x2 matrix, number needs to be between 0 and 2:x
Enter column number where to start 2x2 matrix, number needs to be between 0 and 2:x
The determinant is x for
Matrix B:
Row 0: x x
Row 1: x x
新的2x2矩阵保存在新结构中，我该怎么做？