Thread: Need help with C programming exercise.

In this exercise you are to extend this program - call it helloData.c - so that it prompts the user
for their age and and a dollar amount between 0.00 and 100.00 (floating point number). It then prints out
the following:

Hi <name>. You said your age was <age> and your number was <number>

-------------------------------
This is what I've had so far....and I'm stuck!!!

insert

Code:

#include <stdio.h>


int main (void) {
    char    message[31];


    printf("Hi. My name is program. What is your name? ");
    scanf("%s", message);
    printf("Hi %s\n", message);
    printf("How old are you? ");
    scanf("%s", message);
    printf("Your number is %s%d%.2f", message);
}

I just start learning programming....Can you give me more details?

I still don't get the out put that between 0.00 and 100.00 .....

Code:

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


int main (void) {
    char    message[31];


    printf("Hi. My name is program. What is your name? ");
    scanf("%s", message);
    printf("Hi %s\n", message);
	printf("How old are you? ");
	scanf("%d", message);
	int age;
	printf("Your number is %d%.2f", age);
	return 0;
}

The following lines are alright:

Line 9: You print a prompt
Line 10: You scan a string into a char array
Line 11: You print the string
Line 12: You print another prompt

The following lines are a little screwy:

Line 13: You try to scan an integer, but pass the address of the char array - you need an integer variable to store an integer type
Line 14: You declare an integer called age, but don't give it a value. Hmm, wasn't there a line above where you were trying to scan for an integer?
Line 15: You try to print "age", but you never stored a value to it. Furthermore, you have two format specifiers (%d for int, and %f for float) but only one argument. You should provide two arguments, even if they're the same one.

You can think this way.
1. within the scanf function a. data type (i.e. "%d" for the integer) b. assign the value to the variable (i.e. if age is variable, &age).
2. declare the variable type before use it (i.e, int age)