format numbers output?

hey, is there any way that i can format the output of the numbers, like a print mask or something?

im printing out dollar ammounts, and right now it is say...$1000, is there any way to make it print $1,000...and other numbers such as $1,000,000,000 or something? thanks for your help

Code:

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void
printNumber (int num) {

    //big enough to hold number
  char s_num[100];
  // s_num length
  int len = 0;
 
  sprintf( s_num, "%d", num );
 
  len = strlen(s_num);
     
  printf("$");
  for (int i=0;i<len;i++) {
     
      printf("%c", s_num[i]);
     
      // if we must print a ","
      if ((len-(i+1))%3==0 && len-i!=1)
        printf(",");
  }
  printf("\n");
}

---

Very C.

As I said in your other post. Another option is to use stringstreams and substrings.

This prints out $12,345.68:

Code:

---

    std::cout.imbue(std::locale("en_US"));
    std::cout << std::fixed << std::setprecision(2);
    std::cout << "$" << 12345.678 << std::endl;

---

(Don't forget that setprecision requires "#include <iomanip>")

Note that if you ever need to translate this program and handle other currency formats the only thing you need to change the "en_US" string.. and the dollar symbol. No need to look up the decimal and thousands separators from some reference.

Er... I tryed a better C++ solution, but couldn´t find anything to help me. :o