How to get multiple input using scanf c

Question

#include <stdio.h>

int main()
{
    char name[10];
    int birth_year;
    
    printf("Enter your name : ");
    scanf("%c",name);
    
    printf("Enter your birth year : ");
    scanf("%i",&birth_year);
    
    int age = 2020 - birth_year;
    printf("Your age is %i",age);
}

I am trying to take the value of birth_year as an input but it automatically assigns it to 0 for some reason what am I doing wrong

Duplicated, you can see the answer here: stackoverflow.com/questions/1412513/… — Miguel García
– Miguel García, Commented Aug 7, 2020 at 19:56
@MiguelGarcía Hmm - not an obvious duplicate but I'm sure there is one somewhere. The issue here is reading a single character rather than a string. — Adrian Mole
– Adrian Mole, Commented Aug 7, 2020 at 19:58

Argie · Accepted Answer · 2020-08-07 20:07:30Z

2

In the first scanf you should read a string instead of a char, that should do it. Also, it's always good to have a whitespace before you read a char, so it resets the buffer memory.

#include <stdio.h>
int main()
{
    char name[10];
    int birth_year;

    printf("Enter your name : ");
    scanf(" %s",name);

    printf("Enter your birth year : ");
    scanf(" %d",&birth_year);

    int age = 2020 - birth_year;
    printf("Your age is %i",age);
}

answered Aug 7, 2020 at 20:07

Argie

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2 Comments

Weather Vane Over a year ago

Aside char name[10]; is almost certain to overflow. Be sure to use a longer string such as char name[100]; and restrict the input with scanf(" %99s",name);. These two format specifiers automatically filter leading whitespace, it is only really necessary with %c and %[], which do not.

chux Over a year ago

scanf(" %s",name); is bad/worse than gets.

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