Thread: help in basic C

I need to create 2 programs and I am lost. first must take 3 inputs, a character, and integer, and a floating point; all from different prompts. Then I must call a function that will assemble all inputs into a single string. I must display using puts() call back when the main function has ended. This is what I have so far:

insert

Code:

;

#include "stdafx.h"
#include "stdio.h"
#include "string.h"

void strcat(int[], char[], float[]);
#define max 10
int _tmain(int argc, _TCHAR* argv[])
{
	int n;
	float f;
	char c;
	printf("Enter an integer:");
	scanf_s("%d", &n);
	printf("Enter a character:");
	scanf_s("%c", &c);
	printf("Enter a floating point number:");
	scanf_s("%f", &f);
	
	
strcat(n,"&c");
	return 0;
}

Obviously I am far off. I also need some advice on how to complete this:

1. Create a structure that has one variable called value and one pointer to the list (making it a linked list). Prompt for 5 values from the keyboard as input and store them in the linked list. Print out the current contents of the list. Allow the user to add one more value to the linked list, and print the contents of the list again.

I've been taking this class online and I have had no feedback what so ever, so I have fallen really behind any and all help would be greatly appreciate.

my compilier tells me to use scanf_s() to prevent errors, i don't know why.

I do use strcat() to combine strings right? In my book i've only seen it used to combine two strings in the form of strcat(str1, "srting 2"); can I just add another string in quotations? and can i put an variable earlier defined or and adress(&n) in the function?

Here's what I've got so far on the linked list: It runs, but does not display the five inputs-instead i think it's displaying their addresses. Also I will need to adapt this program to prompt fot 1 more entry and to display the new list with the new entry.

insert

Code:

#include <stdafx.h>
#define maxnum 10
struct value
{
	int num[maxnum]; 
	struct value*nextaddr;
};

int _tmain(int argc, _TCHAR* argv[])
{
	int a,b,c,d,e,f;
	printf("please enter five numbers:");
		scanf("%f,%f,%f,%f,%f", &a,&b,&c,&d,&e,&f);
		struct value t1={a};
		struct value t2={b};
		struct value t3={c};
		struct value t4={d};
		struct value t5={e};
		struct value *first;
		void display (struct value*);
		first=&t1;
        t1.nextaddr=&t2;
		t2.nextaddr=&t3;
		t4.nextaddr=&t5;
		t5.nextaddr=NULL;
		display (first);

	return 0;
}
void display(struct value*contents)
{
	while (contents!=NULL)
	{
		printf("%-5d", contents->num);
		contents=contents->nextaddr;
	}
}

for my first problem it was advised to use the sprintf function. I believe it is to add variables together into a string as I need. But I'm not sure how to use it. this is what i got, but it doesn't work-it says;
'sprintf' : cannot convert parameter 1 from 'void (__cdecl *)(int [],char [],float [])' to 'char *'

insert

Code:

#include "stdafx.h"
#include "stdio.h"
#include "string.h"

void str1(int[], char[], float[]);
#define max 10
int _tmain(int argc, _TCHAR* argv[])
{
	int n;
	float f;
	char c;
	printf("Enter an integer:");
	scanf_s("%d", &n);
	printf("Enter a character:");
	scanf_s("%c", &c);
	printf("Enter a floating point number:");
	scanf_s("%f", &f);
	
	
sprintf(str1, "%d,%c,%f", n,c,f);

	return 0;
}

All I want to do is take an interger, floating point, and a character-assemble it into a string and display it using the puts function. It seems so easy but I can't get it.

Well the first one builds and runs without errors. Though it does not stop to prompt for the character, accept it, and the repeat for the floating point-it asks for them at the same time and when it puts(), it only puts the interger correctly-i think the rest is the address. Thats for the advice so far. char buffer[100]; made it at least run without errors

well I after talking to someone about having it in a different format I tried:
insert

Code:

int _tmain(int argc, _TCHAR* argv[])
{
	void combine(char*new_str1, int n, char c, float f);
	char str1[100];
	int n;
	char c;
	float f;

printf("\nEnter an integer:\n");
	scanf_s("%d", &n);
	printf("\nEnter a character:\n");
	scanf_s("%c", &c);
	printf("\nEnter a floating point number:\n");
	scanf_s("%f", &f);

	combine(str1, n,c,f);
	puts(str1);
	return 0;
}
{
 combine(str1, n,c,f,)
 {	
		str1=sprintf_s(str1, "%d, %f, %c", n,c,f);
	return (str1);
 }
}

but it made me go backwards-it doesn't even run it says missing function header; which i thought is included. But the other way that almost works looks like this:
insert

Code:

#include "stdafx.h"
#include "stdio.h"
#include "string.h"


#define max 10
int _tmain(int argc, _TCHAR* argv[])
{
	char str1[100];
	int n;
	char c;
	float f;
	printf("\nEnter an integer:\n");
	scanf_s("%d", &n);
	printf("\nEnter a character:\n");
	scanf_s("%c", &c);
	printf("\nEnter a floating point number:\n");
	scanf_s("%f", &f);
	
	
sprintf_s(str1, "%d,%c,%f", n,c,f);
puts(str1);

	return 0;
}

Also if you have time please look at my linked list: it works fine but I need to adjust it to prompt for another entry, add it to the linked list, and then re-display the new list. thanks for your help
insert

Code:

#include "stdafx.h"
#define maxnum 10
struct value
{
	int num[maxnum]; 
	struct value*nextaddr;
};



int _tmain(int argc, _TCHAR* argv[])
{
	int a,b,c,d,e,f;
	printf("please enter five numbers:");
		scanf("%d,%d,%d,%d,%d", &a,&b,&c,&d,&e,&f);
		struct value t1={a};
		struct value t2={b};
		struct value t3={c};
		struct value t4={d};
		struct value t5={e};
		struct value *first;
		void display (struct value*);
		first=&t1;
        t1.nextaddr=&t2;
		t2.nextaddr=&t3;
		t3.nextaddr=&t4;
		t4.nextaddr=&t5;
		t5.nextaddr=NULL;
		display (first);

	return 0;
}
void display(struct value*contents)
{
	while (contents!=NULL)
	{
		printf("%-10d", *contents->num);
		contents=contents->nextaddr;
}