C/Console/Scanf

Convert temperatures

<source lang="cpp">

1. include <stdio.h>

int main(){

 int choice = 0;
 double temperature = 0.0;
 printf("Select the conversion (1 or 2): ");
 scanf("%d", &choice);
 printf("Enter a temperature in degrees %s: ",
                         (choice == 1 ?  "Centigrade" : "Fahrenheit"));
 scanf("%lf", &temperature);
 if(choice == 1)
   printf("That is equivalent to %.2lf degrees Fahrenheit\n", temperature*9.0/5.0+32.0);
 else
   printf("That is equivalent to %.2lf degrees Centigrade\n", (temperature-32.0)*5.0/9.0);

}

      </source>

Pointer argument to scanf

<source lang="cpp">

1. include <stdio.h>

void main() {

  int value = 0;
  int *pvalue = NULL;
  pvalue = &value;             /* Set pointer to refer to value   */
  printf ("Input an integer: ");
  scanf(" %d", pvalue);        /* Read into value via the pointer */
  printf("\n Your enter is %d\n", value);  /* Output the value entered */

}

      </source>

Read formatted data from string

<source lang="cpp">

1. include <stdio.h>

int main(void) {

 char str[80];
 int i;
 sscanf("hello 1 2 3 4 5", "%s%d", str, &i);
 printf("%s %d", str, i);
 return 0;

}

      </source>

Reading characters with scanf()

<source lang="cpp">

1. include <stdio.h>

void main() {

 char initial = " ";
 char name[80] = { 0 };
 char age[4] = { 0 }; 
 
 printf("Your first initial: ");
 scanf("%c", &initial );
 
 printf("Your first name:" );
 scanf("%s", name );
 if(initial != name[0])
    printf("\n%s,you got your initial wrong.", name);
 else
    printf("\nHi, %s. Your initial is correct.", name );
 printf("\nYour full name and your age separated by a comma:\n" );
 scanf("%[^,] , %[0123456789]", name, age );
 printf("\nYour name is %s and you are %s years old\n", name, age );

}

      </source>

Various read: string, float: scanf

<source lang="cpp">

1. include <stdio.h>

int main(void) {

 char str[80], str2[80];
 int i;
 /* read a string and an integer */
 scanf("%s%d", str, &i);
 /* read up to 79 chars into str */
 scanf("%79s", str);
 /* skip the integer between the two strings */
 scanf("%s%*d%s", str, str2);
 return 0;

}

      </source>