how do you change a variable for another variable in c?

Question

im a beginner with a not so good teacher and trying to figure things out on my own...

#include<stdio.h>
#include<conio.h>

int n,x,c,a;
main()
{
    scanf("%d",&n);
    do
    {
        scanf("%d",&x);
        a=x;
        c++;
    }
    while(c!=n);
    printf("%d",a);

}

in this code, i'd like to know if it's possible to change the 'a' in (a=x;) to, lets say 'b' then 'c', then 'd'.... i want to store the different values from scanf("%d",&x); in different variables. Example, if i enter the values, 1,2,3,4, i'd like the output to be a=1,b=2,c=3,d=4

thanks for the help

Look up arrays. Check manual page for scanf for return values. Initialise variables — Ed Heal
– Ed Heal, Commented May 10, 2015 at 7:17
Be careful when using variables you are not explicitly initializing, for example c. It works now because global variables are zero-initialized, but if you make c a local variable it will not be initialized and c would have an indeterminate value, and using it uninitialized would lead to undefined behavior. And you really should make the variables local, having global variables is considered a big no-no by most. — Some programmer dude
– Some programmer dude, Commented May 10, 2015 at 7:19
thanks for the response, although there are some concepts you mentioned that i dont understand (beginner...). zero-initialized,uninitialized,undefined behavior,global variables. would you care to explain please? (it's ok if you dont, google and stuff...) — Zugoldragon
– Zugoldragon, Commented May 10, 2015 at 7:23
what he means is that you should assign a value to c before the do/while loop. Right now it works, but you should do it to avoid potential problems with it — Matthew
– Matthew, Commented May 10, 2015 at 7:38
oooh.... looking back, this makes sense. well, thanks, i'll keep it in mind. — Zugoldragon
– Zugoldragon, Commented May 10, 2015 at 7:44

morusa · Accepted Answer · 2015-05-10 07:28:22Z

2

I strongly recommend you to use arrays, if your prof. will be ok with it. And there is a question: do you want to just print it ? or change ..

#include<stdio.h>
int main(){
    int n[4];
    int i;

    for(i=0;i<4;i++){
        printf("Enter 4 numbers");
        scanf("%d",&n[i]);  
    }
    for(i=0;i<4;i++){
        printf("%c = %d\n",(97+i),n[i]);    
    }

}

answered May 10, 2015 at 7:28

morusa

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1 Comment

Vlad from Moscow Over a year ago

Instead of (97+i) it would be better to write 'a' + i

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