another quicky :-)

[Unregistered]

#include<stdio.h>
void main()
{
int PersonID,Wage,Sex,Age,n;
int a[10][4];
printf("please enter the amount of people you will use \n\r");
scanf("%d",&n);
for(PersonID=1;PersonID<=n;PersonID++);
{
printf("please enter the Person ID\n");
scanf("%d",&a[PersonID][10]);
return 0;
}
}




I am trying to make the program loop and keep asking for values of person ID until N is reached i.e. user defines how many inputs
to the array i.e. N ........ for some reason I can only enter 1 value for person id and not 10 if thats what I enter n as ............

any ideas ???

thanks

[Stoned_Coder]

scanf("%d",&a[PersonID][10]);

should be

scanf("%d",&a[PersonID-1 ][10]);

you also have your return statement inside the loop. move it below the loop.

[Unregistered]

nope don't help V_V

[Stoned_Coder]

#include<stdio.h> 
int main() 
{ 
int PersonID,Wage,Sex,Age,n; 
int a[10][11]; 
printf("please enter the amount of people you will use \n\r"); 
scanf("%d",&n); 
for(PersonID=1;PersonID<=n;PersonID++); 
{ 
printf("please enter the Person ID\n"); 
scanf("%d",&a[PersonID-1][10]); 
} 
return 0; 
}

try that.

[Stoned_Coder]

that should have fixed it but its beyond me why you want to store anything at the end of an array like that without using the rest of it.

[Unregistered]

what I am trying to do is create a table basically the array needs to store data for the for variables personid, wage, age, sex ...........

[Salem]

> personid, wage, age, sex
So
PersonId is stored in a[i][0]
Wage is stored in a[i][1]
Age is stored in a[i][2]
Sex is stored in a[i][3]

If so, then
scanf("%d",&a[PersonID-1][0]);

[Unregistered]

so wage may equal

scanf("%d",&a[Wage-2][10]);???????/

[Salem]

> so wage may equal
> scanf("%d",&a[Wage-2][10]);???????/
No,

scanf("%d",&a[PersonID-1][1]);

[Unregistered]

I suppose u could say I am hopelessly confused hehe

#include<stdio.h>
int main()
{
int PersonID,Wage,Sex,Age,n;
int a[10][4];
printf("please enter the amount of people you will use \n\r");
scanf("%d",&n);
for(PersonID=1;PersonID<=n;PersonID++);
{
printf("please enter the Person ID\n");
scanf("%d",&a[PersonID][10]);
}
for(Wage=1;Wage<=n;Wage++);
{
printf("please enter the Wage\n");
scanf("%d",&a[Wage][10]);
}
for(Sex=1;Sex<=n;Sex++);
{
printf("please enter the Sex\n");
scanf("%d",&a[Sex][10]);
}
for(Age=1;Age<=n;Age++);
{
printf("please enter the Age use 1 for male and 0 for female\n");
scanf("%d",&a[Age][10]);
}
return 0;


I am a newbie if u help please may u explain in real simple language thanks !

[Stoned_Coder]

Do you listen to what you are told ?

first off. arrays in c/c++ have there elements counted from zero. Thus if you say char array[10] the last element you can access is array[9].The first element being array[0] and not array[1]
You can think of 2d arrays as an array of 1d arrays.Thus char array[3][3] has these addresses...
array[0][0],array[0][1],array[0][2]
array[1][0],array[1][1],array[1][2]
array[2][0],array[2][1],array[2][2]

secondly for loops dont have semicolons after them.Was wrecked earlier and didnt notice that before.

starting to see why we needed that -1 in your indexing?

#include<stdio.h> 
int main() 
{ 
int PersonID,n; 
int a[10][4]; 
printf("please enter the amount of people you will use \n\r"); 
scanf("%d",&n); 
for(PersonID=1;PersonID<=n;PersonID++) 
{ 
printf("please enter the Person ID\n"); 
scanf("%d",&a[PersonID-1][0]); 
} 
// at this point a[PersonID-1][0] holds the personid
for(PersonID=1;PersonID<=n;PersonID++) 
{
printf("please enter the Wage\n");
scanf("%d",&a[PersonID-1][1]);
}
// at this point a[PersonID-1][1] holds the wage information
for(PersonID=1;PersonID<=n;PersonID++)
{
printf("please enter the Age\n");
scanf("%d",&a[PersonID-1][2]);
}
//at this point a[PersonID-1][2] holds the age information

return 0; 
}

of course it would have been easier to put it all inside one loop.Thats an exercise for you....

[Unregistered]

#include<stdio.h>

int main()
{
int /* PersonID,Wage,Sex,Age, */ n, i;
int a[10][4];
printf("please enter the amount of people you will use \n");
scanf("\n%d",&n);
printf("\n=%d\n\n", n);
for (i=0; i<n; i++)
{
printf("please enter the Person ID (person %d)\n", n);
scanf("\n%d",&a[i][0]);
printf("please enter the Wage (person %d)\n", n);
scanf("\n%d",&a[i][1]);
printf("please enter the Age (person %d)\n", n);
scanf("\n%d",&a[i][2]);
printf("please enter the Sex use 1 for male and 0 for female (person %d)\n", n);
scanf("\n%d",&a[i][3]);
}

printf("Data held in array:\n");
printf("~~~~~~~~~~~~~~~~~~~\n");
for (i=0; i<n; i++)
{
printf("Person %d\n\n", i);
printf("ID: %d\n", a[i][0]);
printf("Wage: %d\n", a[i][1]);
printf("Sex: %d\n", a[i][2]);
printf("Age: %d\n\n", a[i][3]);
}
return 0;
}


think this is better ????

[Salem]

Much better - just a couple of formatting funnies to sort out, and I think you're done

[Unregistered]

where can I learn how to sort data ???

[Stoned_Coder]

how bout here