I got this function so far :
void sumcol(int a[r][c],int r,int c){
int i,j,sum=0;
//int sizec= sizeof(a)/sizeof(a[0][0]);
//int sizer= sizeof(a)/sizeof(a[0]);
for (i=0;i<r;i++){
for (j=0;j<c;j++) sum=sum+a[j][i];
cout<<"Suma pe coloana "<<i<<" este : "<<sum<<endl;
sum=0;
}
}
I get an error on the first line that r and c were not declared in this scope. Why? Though I read right there : https://www.eskimo.com/~scs/cclass/int/sx9a.html that this is a Correct way of declaring.
I think your real problem is passing 2d array into function. If you know your array size in compile time I will advice something like:
template <int r, int c>
void sumcol(int (&a)[r][c]){
int i,j,sum=0;
//int sizec= sizeof(a)/sizeof(a[0][0]);
//int sizer= sizeof(a)/sizeof(a[0]);
for (i=0;i<r;i++){
for (j=0;j<c;j++) sum=sum+a[j][i];
std::cout<<"Suma pe coloana "<<i<<" este : "<<sum<< std::endl;
sum=0;
}
}
and calling it like forexample :
int main()
{
int temp[3][5]; // You don't forget to initialize this in your real code
sumcol(temp);
}
Or if you are using dynamiccally allocated matrix array(malloc). Than use something like:
void sumcol(int** a,int r,int c){
do stuff
Consider reading this thread first Passing a 2D array to a C++ function
I personally find it easier to do this stuff with cool C++ Vectors instead C arrays .
sumcol(temp);