c++ - Read file with separator a space and a semicolon -

i wrote parse file numbers, separator space. goal read every number of file , store in corresponding index of matrix a. so, first number read, should go a[0][0], second number a[0][1] , on.

#include <iostream> #include <string> #include <fstream>  using namespace std;  int main() {     const int n = 5, m = 5;     double a[n*m];     string fname("test_problem.txt");     ifstream file(fname.c_str());     (int r = 0; r < n; ++r) {         (int c = 0; c < m; ++c) {             file >> *(a + n*c + r);         }     }      (int r = 0; r < n; ++r) {         (int c = 0; c < m; ++c) {             cout << *(a + n*c + r) << " ";         }         cout << "\n";     }     cout << endl;      return 0; } 

now, trying parse file this:

1 ;2 ;3 ;4 ;5 10 ;20 ;30 ;40 ;50 0.1 ;0.2 ;0.3 ;0.4 ;0.5 11 ;21 ;31 ;41 ;5 1 ;2 ;3 ;4 ;534 

but print (thus read) garbage. should do?

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edit

here attempt in c, fails:

file* fp = fopen("test_problem.txt", "r"); double v = -1.0; while (fscanf(fp, "%f ;", &v) == 1) {     std::cout << v << std::endl; } 

-1 printed.

you should remove semicolon before converting

std::string temp; file >> temp; std::replace( temp.begin(), temp.end(), ';', ' '); *(a + n*c + r) =    std::stod( temp );