vsprintf example in C

Header file:

    stdio.h

Synopsis:

     int vsprintf(char *str, const char *format, va_list arguments);

Description:

    It is similar to sprintf, except that the variable argument list is given as arguments.

vsprintf function C example:

  #include<stdio.h>
  #include<string.h>
  #include<stdarg.h>

  void vprintf_impl(char *str, char *format, ...) {
        va_list arg;
        va_start (arg, format);
        vsprintf (str, format, arg);
        va_end (arg);
  }

  int main() {
        char name[100], company[100], str[256];
        int age, salary;
        printf("Enter your name:\n");
        fgets(name, 90, stdin);
        name[strlen(name) - 1] = '\0';
        printf("Enter your designation:\n");
        fgets(company, 90, stdin);
        company[strlen(company) - 1] = '\0';
        printf("Enter your age and salary:\n");
        scanf("%d%d", &age, &salary);
        vprintf_impl(str, "%s works as %s earns %d per month"
                " at the age of %d\n", name, company, salary, age);
        printf("Output:\n%s", str);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/cpgms/exp$ ./a.out
  Enter your name:
  JP
  Enter your designation:
  Engineer
  Enter your age and salary:
  23 3000

  Output:
  JP works as Engineer earns 3000 per month at the age of 23