I'm trying to reference global variables in a function called "userval", and then modify those variables based on user input. Do I need to return these variables at the end of my function?
I am attempting to check my code by printing these global variables within the main function. However, I keep getting random characters.
Here is my code below.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// Global Constants
#define MAX_PSWD_LEN 80
char password = 0;
int len = 0;
int upper = 0;
int lower = 0;
int digit = 0;
int special = 0;
int main(int argc, char *argv[]) {
userval();
printf(&len);
printf(&upper);
printf(&lower);
printf(&digit);
printf(&special);
}
int userval() {
printf("Please enter the minimum length of your password: \n");
scanf("%d", &len);
printf("Please enter the minimum number of uppercase letters in your password: \n");
scanf("%d", &upper);
printf("Please enter the minimum number of lowercase letters in your password: \n");
scanf("%d", &lower);
printf("Please enter the minimum number of decimal digit characters in your password: \n");
scanf("%d", &digit);
printf("Please enter the minimum number of special characters in your password: \n");
scanf("%d", &special);
printf("Thank you. \n");
return len, upper, lower, digit, special;
}
That's not how the printf function works.
The first parameter is a format string. It contains any static text you want to print along with format specifiers for any values you want to print.
For example, if you want to print only a integer followed by a newline, the format string you would use is "%d\n", where %d is the format specifier for an integer and \n is a newline character.
Any subsequent parameters are used to fill in the format. In the case of the values you want to print, you would do the following:
printf("%d\n", len);
printf("%d\n", upper);
printf("%d\n", lower);
printf("%d\n", digit);
printf("%d\n", special);