c - scanf not reading properly because of gets function

Question

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main(){
    int n=1,i,cont;
    char string[50];

    scanf("%d",&n);
    while(n!=0){
        gets(string);
        cont=0;
        for(i=0;i<strlen(string);i++){
            if(string[i]=='.'){
                cont++;
            }
        }
        if(cont%2==0){
            printf("S
");
        }else{
            printf("N
");
        }
        scanf("%d",&n);
    }
    return 0;
}

My problem is quite simple but troublesome, I want to read an integer value n, and then read a string, after that read n again, but whenever I run the program, it only reads the string value... but if I digit 0 the program ends... it's like my scanf is within the gets function.

Answer 1

Mixing scanf with gets or fgets is troublesome because they each handle newlines differently.

Get rid of the gets call (which is unsafe anyway) and replace it with the following scanf call:

scanf("%49s", string);

This will read at most 49 characters into string (i.e. one less that its size).