My Code :

#include <stdio.h>

int main()
{

    int size,i;

    printf("Enter the size of the string: ");
    scanf("%d",&size);
    int arr[size];
    printf("Enter the String: ");
    for(i=0;i<size;i  )
    {
        scanf("%d",&arr[i]);
    }
    printf("The string you've entered is: ");
    for(i=0;i<size;i  )
    {
        printf("%d ",arr[i]);
    }
    return 0;
}

I've tried to enter an array of numbers like: 10234, but the next statement is not getting executed, it's not showing me the printf statement i.e "The string you've entered is: ".

But it's working if I enter the array of numbers like: 1 0 2 3 4 (with spaces). How can I make it work without spaces too, can you help me with it ?.

CodePudding user response：

#include <stdio.h>

int main()
{

    int size,i;

    printf("Enter the size of the string: ");
    scanf("%d",&size);
    char arr[size];
    printf("Enter the String: ");
    for(i=0;i<=size;i  )
    {
        scanf("%c",&arr[i]);
    }
    printf("The string you've entered is: ");
    for(i=0;i<=size;i  )
    {
        printf("%c ",arr[i]);
    }
    return 0;
}

CodePudding user response：

If you want to read string and convert digits to the int array:

size_t getsize(FILE *fi)
{
    char buff[20];
    size_t result = 0;
    if(fgets(buff, sizeof(buff), fi))
    {
        if(sscanf(buff, "%zu", &result) != 1) result = 0;
    }
    return result;
}


int main()
{

    size_t size,i;

    printf("Enter the size of the string: ");
    if(!(size = getsize(stdin))) goto error_exit;

    do{
        char str[size   2];
        int arr[size];
        printf("Enter the String: ");
        if(!fgets(str, size   2, stdin)) goto error_exit;

        for(i=0;i<size;i  )
        {
            if(str[i] == '\n') break;
            if(!isdigit((unsigned char)str[i])) goto error_exit;
            arr[i] = str[i] - '0';
            printf("%d ",arr[i]);
        }
        return 0;
    }while(0);
    error_exit:
    printf("Error!!!\n");
    return 1;
}

CodePudding user response：

Use scanf("", &arr[i]); (1 added) to limit input to 1 non-white-space character.

Also better to check the return value of all scanf() calls.