A simple program in C

[daisypolly]

Hi,

I am making a cash register in C. I want to have an add ,remove functionality.I am doing that I get an error.
The user will press 1 and they will be able to add the item name and the item price.
my code is:

<code>
#include <stdio.h>
int itemPrice = 0;
char itemName ;

int main(int argc, char *argv[]){

int n = 0;
int number=0;
int price1=0;
char item1;



while ( number <= 6 ) {
printf("1. Add Item\n");
printf("2. Compute Total\n");
printf("3. Compute Average\n");
printf("4. Compute Change\n");
printf("5. Reset Cash-register\n");
printf("6. Quit\n");
printf("Enter Option: ");
scanf("%d",&number);

if(number==1){

scanf("%d,%c",price1,item1);
add(price1,item1);

//printf("basket is %d",price1,item1);
}

if(number==3){
printf("you pressed3\n");
}
if(number==4){
printf("you pressed4\n");
}
if(number==5){
printf("you pressed5\n");
}
if(number==6){
break;
}
if(number>6){
printf("Invalid Option\n");
}
break;
}
}

void add(int aPrice,char aName){
itemPrice = aPrice;
itemName = aName;
}
</code>

Thanks for anyone who can help.
Daisy

 

[sedj]

You need to put the prototype of the 'add' function before the main() function.

Eg :

void add(int aPrice,char aName);

int main ....

You also need to pass pointers into scanf like this :

scanf("%d,%c",&price1,&item1);

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http://www.primrose.org.uk

 

[daisypolly]

thanks for the reply. I did what you told me the program is now compiling but is in doing what I want to do.some how there is a finite while loop when I enter a string as an input also when the user adds the item the item is not being added correctly.

<code>
#include <stdio.h>
int itemPrice = 0;
char itemName ;
void add(int itemPrice,char itemName);
int main(int argc, char *argv[]){

int n = 0;
int number=0;
int price1=0;
char item1;



while ( number <= 6 ) {
printf("1. Add Item\n");
printf("2. Compute Total\n");
printf("3. Compute Average\n");
printf("4. Compute Change\n");
printf("5. Reset Cash-register\n");
printf("6. Quit\n");
printf("Enter Option: ");
scanf("%d",&number);

if(number==1){

scanf("%d,%c",&itemPrice,&itemName);
add(itemPrice,itemName);

printf("basket is %d\n",itemPrice,itemName);
}

if(number==3){
printf("you pressed3\n");
}
if(number==4){
printf("you pressed4\n");
}
if(number==5){
printf("you pressed5\n");
}
if(number==6){
break;
}
if(number>6){
printf("Invalid Option\n");
}

}
}

void add(int aPrice,char aName){
itemPrice = aPrice;
itemName = aName;
}
</code>

Thanks for the help.

 

[sedj]

there is a finite while loop when I enter a string as an input

Thats because you are scanf'ing one int and one char - not a string.
To add strings, you will need to change your programme to handle char pointers, not just chars.

Did you want us to help get your current programme running, or to write the whole thing for you ? How will you learn if the second ?


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http://www.primrose.org.uk