HELP! How To Enter Spaces into a string

[Rodrigo Marques]

Hello, I was trying to run this piece of code that allows me to scanf a sentence, and then print it, but the only problem is, when I print it the spaces are not counting

For Example I want the output to be:

Hey how are you doing

But instead the output is:

Heyhowareyoudoing

int main()
{
    char sentence[50];
    puts ("Write your sentence");
    scanf("%s",&sentence);
    printf("\n\nYour centence is: %s\n",centence);
}

Thanks


And this is what Im trying to do as an exercise for tomorrow
if you have any suggestions, I'll be appreciative

P.S. Sorry for the output code being in Portuguese

void menu()
{
    
    puts("\t\t ______________________");
    puts("\t\t|                      |");
    puts("\t\t|         Menu         |");
    puts("\t\t|                      |");
    puts("\t\t|      1. STRLEN       |");
    puts("\t\t|      2. STRCPY       |");
    puts("\t\t|      3. STRCAT       |");
    puts("\t\t|      4. STRCMP       |");
    puts("\t\t|      5. STRCHR       |");
    puts("\t\t|      6. STRSTR       |");
    puts("\t\t|      7. STRLWR       |");
    puts("\t\t|      8. STRUPR       |");
    puts("\t\t|                      |");
    puts("\t\t|______________________|");
    
}
void decision()
{
    int op;
    
    puts("\nQual a funcao que quer testar? ");
    scanf("%d",&op);
    
    if(op==1)
    {
        stringLenght();
        fflush(stdin);
    }
    
    if(op==2)
    {
        stringCopy();
        fflush(stdin);
    }
    
    if(op==3)
    {
        stringMerge();
        fflush(stdin);
    }
    
    if(op==4)
    {
        stringCompare();
        fflush(stdin);
    }
    
    if(op==5)
    {
        stringSearchChar();
        fflush(stdin);
    }
    
    if(op==6)
    {
        stringSearchString();
        fflush(stdin);
    }
    
    if(op==7)
    {
        stringToLower();
        fflush(stdin);
    }
    
    if(op==8)
    {
        stringToUpper();
        fflush(stdin);
    }
    
    
    
    
    
}


void menuInfo()
{
    
    
}


//1
int stringLenght()
{
    //Syntax for STRLEN = strlen (<comparable string>);
    int var1;
    
    puts("Quantos Caractreres Pensa em Introduzir? ");
    scanf("%d",&var1);


    int lenght;
    char str[var1],name1[var1];
    
    puts ("De um nome a String");
    scanf("%s",&name1);
    
    fflush(stdin);
    printf("\n\nInsira algums caracteres em %s: ",name1);
    scanf("%s",&str);    
    lenght=strlen(str);
    fflush(stdin);
    printf("O tamanho que '%s' = %s ocupa e de: %d Bytes",name1,str,lenght);
    
}
//2
void stringCopy()
{
    int var1;
    
    puts("Quantos Caractreres Pensa em Introduzir? ");
    scanf("%d",&var1);
    
    char name1[var1],name2[var1],str[var1],str1[var1];
    int op;
    
    fflush(stdin);
        
    puts ("De um nome a Primeira String");
    scanf("%s",&name1);
    puts ("De um nome a Segunda String");
    scanf("%s",&name2);
    
    fflush(stdin);
    printf("\n\nEscreva Algo dentro da string: %s\n",name1);
    scanf("%s",&str);
    printf("Escreva Algo dentro da string: %s\n",name2);
    scanf("%s",&str1);
    
    fflush(stdin);
    printf("\n\n1. Quer Copiar a string %s para a string %s?\n",name1,name2);
    puts("ou");
    printf("2. Quer Copiar a string %s para a string %s?\n\n",name2,name1);
    puts("Confirme Inserindo '1' ou '2' na consola");
    scanf("%d",&op);
    
    if(op==1)
    {    
        printf("A string Final e: %s = %s",name2,strcpy(str1,str));
    }
    
    if(op==2)
    {        
        printf("A string Final e: %s = %s",name1,strcpy(str,str1));
    }


}
//3
void stringMerge()
{
    int var1;
    
    puts("Quantos Caractreres Pensa em Introduzir? ");
    scanf("%d",&var1);
    
    char name1[var1],name2[var1],str[var1],str1[var1];
    int op;
    
    fflush(stdin);
        
    puts ("De um nome a Primeira String = Fonte");
    scanf("%s",&name1);
    puts ("De um nome a Segunda String = Destino");
    scanf("%s",&name2);
    fflush(stdin);
    printf("\n\nEscreva Algo dentro da string: %s\n",name1);
    scanf("%s",&str);
    fflush(stdin);
    printf("Escreva Algo dentro da string: %s\n",name2);
    scanf("%s",&str1);
    fflush(stdin);
    
    strcat(str,str1);
    
    printf("A string de destino = '%s' vai ter como produto: %s",name1,str);
    
    
}
//4
void stringCompare()
{
    
    
    
}
//5
void stringSearchChar()
{
    
    
    
}
//6
void stringSearchString()
{
    
    
    
}
//7
void stringToLower()
{
    
    
    
}
//8
void stringToUpper()
{
    
    
    
}


int main()
{
    int op;
    op=1;
    
    do{
    system("cls");
    menu();
    decision();
    _getch();
    
    }while(op=1);
    
}

[Asymptotic]

printf("\n\nYour centence is: %s\n",centence);

You mis-spelled your own variable. It should be sentence not "centence."


To read in spaces in your sentence, you can use fgets instead of scanf:

fgets(sentence, 50, stdin);

Will store up to 50 characters from the console (stdin) in the variable sentence.

The reason why you have to specify stdin is because fgets is designed to accept text from any file so you could even use it with a text file by putting the filename instead of stdin, but that is not your purpose here.

You could use sentence = gets() too but this does not limit how much the user can enter so they can enter more than 50 characters and overflow your buffer (the array that you made which is only 50 chars big) and cause all sorts of issues.

[Salem]

You should also stop using fflush(stdin)
FAQ > Why fflush(stdin) is wrong - Cprogramming.com

[Matticus]

while(op=1)

Be aware of the difference between the assignment operator = and the equality operator ==