CODEWITHSUNDEEP
cscanf
akram1rekik
akram1rekik

Reputation: 153

Escape scanf within a while loop

I have this sheet of code:

listCh remplir(){
    char rep;
    listCh l,aux,p;
    printf("1-veuillez entrer un element?(n pour quitter)\n");
    scanf("%c",&rep);
    if(rep=='n')
        l=NULL;
    else{
        l=malloc(sizeof(listCh));
        printf("2-Donnez la valeur d element!\n");
        scanf("%d",&l->valeur);
        p=l;
    }
    while(rep!='n'){
        printf("voulez-vous ajouter un nouveau element de la list? (n pour quitter)\n");
        scanf("%c",&rep);
        if(rep!='n'){
            aux=malloc(sizeof(listCh));
            printf("Donnez la valeur d element!\n");
            scanf("%d",aux->valeur);
            p->suiv=aux;
            p=aux;
        }
        else{
            p->suiv=NULL;
        }

    }
    return l;
}

There is no error while executing ! But, the problem is that my program escapes the first "scanf" function in the "while" loop.

I didn't find an explanation for this.

I need some help please.

Many thanks :)

Upvotes: 0

Views: 257

Answers (2)

tdao
tdao

Reputation: 17678

Always remember to put a space before %c when scanf() a character variable. A bit unusual, but that's how to skip all the buffered spaces in the input stream before you can get the real character.

scanf("%c",&rep); should be scanf(" %c",&rep);

Upvotes: 3

Jorgel
Jorgel

Reputation: 930

It is probably reading your enter from your first scanf.
Try putting a getchar() before your scanf on the loop

Upvotes: 1

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