So for my homework I have to create a function for adding two matrices, the numbers are given by the user, and I think I have the function somewhat down, I just have no idea what to return because I know you can't return an array, so I tried making a variable to set it equal to but it's not working? Can someone help me out with this?
This is the part I'm stuck on:
int add_matrix(int a[][10], int b[][10], int c[][10], int Anum_rows, int Anum_cols)
{
int matrix_total = c[0][0];
for (int i = 0; i < Anum_rows; ++i) {
for (int j = 0; j < Anum_cols; ++j) {
c[i][j] = a[i][j] + b[i][j];
}
c[i][j] = matrix_total;
}
return matrix_total;
}
The last j in the c array is underlined with red also in visual studio.
Your code already does what it needs, it stores the resulting matrix in c, which, since arrays are passed as pointers, will still contain the updated values when add_matrix() returns. You just have extra code in the function, which should really not be needed to complete the matrix add operation:
void add_matrix(int a[][10], int b[][10], int c[][10], int Anum_rows, int Anum_cols) {
for (int i = 0; i < Anum_rows; ++i) {
for (int j = 0; j < Anum_cols; ++j) {
c[i][j] = a[i][j] + b[i][j];
}
}
}
Good point about Anum_cols. There is no need to pass in the number of columns when it is specified in the argument definition and it could lead to future errors.
#define NUM_COLS 10
void add_matrix(int a[][NUM_COLS], int b[][NUM_COLS], int c[][NUM_COLS], int Anum_rows)
{
for (int i = 0; i < Anum_rows; ++i) {
for (int j = 0; j < NUM_COLS; ++j) {
c[i][j] = a[i][j] + b[i][j];
}
}
}
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