# Passing 2d dynamic array to a function

view full story

http://www.daniweb.com – I am a beginner with C++ so please excuse my ignorance. I am attempting to pass a dynamically created 2d array to a function. The array the [3]x[variable] array is created like this.         //Create array for the transformed coords         double **transf;         transf = new double*[3];         for (int i=0;i<atoms;i++){                 cout << i;                 transf[i]=new double[atoms];         }I declare the function and call it void printdata(int, string*, double* , double*,double**); int main (int argc, char **argv) { ... printdata(allatoms ,name, rot1, rot2, transf); ...}Here is the function. void printdata(int allatoms ,string* name[], double rot1[], double rot2[], double** transf[][]){         for (int i=0; i<allatoms; i++){                 if (i==0){                         cout << name[i];                         for (int r1=0; r1<3; r1++){                                 printf("  %*.*f",15,8,rot1[r1] );                         }                         cout << endl;                 }                 if (i==1){                         cout << name[i];                         for (int r2=0; r2<3; r2++){                                 printf("  %*.*f",15,8,rot2[r2] );                         }                         cout << endl;                 }                 if (i>1){                         cout << name[i];                         for (int r3=0; r3<3; r3++){                                 printf("  %*.*f",15,8,transf[r3][i-2] );                         }                         cout << endl;                 }         } } When I try to compile I get rotation.cpp(225): error: parameter type involves pointer to array of unknown bound void printdata(int allatoms ,string* name[], double rot1[], double rot2[], double** transf[][]){ rotation.cpp(244): error: expression must be a pointer to a complete object type printf(" %*.*f",15,8,transf[r3][i-2] ); How can I pass this array? I would just declare the variables as global variables but the size of the array is passed in an argument to the program. (General)