C structures and functions - c

Question

I'm new to C programming and I am trying to create a function that adds values to a structure but it does not return anything.
This function is meant to allow the user to add records.
#include <stdio.h>
#include <string.h>
struct Produit {
int Num;
char Nom[50];
char Description[100];
float Prix;
} s[10];
void add(struct Produit s[],int n);
void display(struct Produit s[],int p,int n)
int main {
add(s,1);
display(s,1);
++n;
}
void add(struct Produit s[], int n){
again:
printf("\nEntrez le nom du produit à ajouter:");
scanf("%s",s[n].Nom);
if(searchP(s,s[n].Nom,n)!=-1){
printf("Déjà existant\n");goto again;
}
printf("Entrez la description :");
scanf("%s",&s[n].Description);
printf("Entrez le prix :");
scanf("%f",&s[n].Prix);
}
void display(struct Produit s[],int p,int n) {
printf("Nom du produit: ");
puts(s[p-1].Nom);
printf("Description: ");
puts(s[p-1].Description);
printf("Prix: %.1f", s[p-1].Prix);
printf("\n");
}
When I run this it works fine but when I verify if the record that I've entered is is there I don't find anything. I try to display the record but it's empty.
it returns this :
Entrez le nom du produit α ajouter:pen
Entrez la description :red
Entrez le prix :1.99
Nom du produit:
Description:
Prix: 0.0
can anyone tell what is wrong. thanks
PS : The function SearchP is working fine in other parts of the code so I don't think it is the problem, but nonetheless here is it.
int searchP(struct Produit s[],char Name[], int n) {
int found =-1,i;
for (i = 0; i < n-1 && found==-1; i++)
{
if (strcmp(s[i].Nom,Name)==0) {
found=i;
}
else
found=-1;
}
return found;
}

Answer 1

Here is a modified version of your code that works better but still needs some work.
As already commented you need a global counter for the s array (here: nbp).
There also one-off errors when searching into s.
#include <stdio.h>
#include <string.h>
struct Produit {
int Num;
char Nom[50];
char Description[100];
float Prix;
} s[10];
int nbp = 0;
void display(struct Produit s[],int p) {
printf("Nom du produit: ");
puts(s[p].Nom);
printf("Description: ");
puts(s[p].Description);
printf("Prix: %.1f", s[p].Prix);
printf("\n");
}
void add(struct Produit s[]);
int searchP(struct Produit s[],char Name[]) {
int found =-1,i;
for (i = 0; i < nbp && found==-1; i++)
{
if (strcmp(s[i].Nom,Name)==0) {
found=i;
}
else
found=-1;
}
return found;
}
int main () {
add(s);
display(s, 0);
return 0;
}
void add(struct Produit s[]){
again:
printf("\nEntrez le nom du produit à ajouter:");
scanf("%s",s[nbp].Nom);
if(searchP(s,s[nbp].Nom)!=-1){
printf("Déjà existant\n");goto again;
}
printf("Entrez la description :");
scanf("%s",s[nbp].Description);
printf("Entrez le prix :");
scanf("%f",&s[nbp].Prix);
nbp++;
}
Execution:
./myprog
Entrez le nom du produit à ajouter:Nom
Entrez la description :Desc
Entrez le prix :1
Nom du produit: Nom
Description: Desc
Prix: 1.0