How to fix this C

Question

#include<conio.h>
#include<stdio.h>
#include<math.h>
void nhapmang(int a[], int n)
{
    for(int i=0; i<n; i++)
    {
        printf("nhap a[%d]",i);
        scanf("%d",&a[i]);
    }
}
void xuatmang(int a[], int n)
{
    for(int i=0; i<n; i++)
    {
        printf("%d",a[i]);
        printf("\n");
    }
}
int timvitringtulonhon23(int a[], int n)
{
    for(int i=0; i<n; i++)
    {
        if(a[i]<0)
        {
            printf("vi tri pt am dau tien : %d \n", a[i]);
        }
            else
                return -1;
    }
}
void main()
{
    int a[100];
    int n;
    int x;
    printf("nhap slpt : ");
    scanf("%d",&n);
    nhapmang(a, n);
    xuatmang(a, n);
    timvitrisoamdautien(a, n);
}

//i need help i dont know what to do the thing i was trying to do is find the number > 23

Answer 1

1. Use English identifiers please so others can have an idea of what your code is doing.
2. User the right function names (the compiler tells you this error)
3. I'm not sure what your last function is supposed to return. It only returns -1 if it does not find a negative number. What shall it return when every number was negative?

#include<conio.h>
#include<stdio.h>
#include<math.h>

void nhapmang(int a[], int n)
{
    for (int i = 0; i < n; i++)
    {
        printf("nhap a[%d]", i);
        scanf("%d", &a[i]);
    }
}

void xuatmang(int a[], int n)
{
    for (int i = 0; i < n; i++)
    {
        printf("%d", a[i]);
        printf("\n");
    }
}

int timvitringtulonhon23(int a[], int n)
{
    for (int i = 0; i < n; i++)
    {
        if (a[i] < 0)
        {
            printf("vi tri pt am dau tien : %d\n", a[i]);
        }
        else
        {
            return -1;
        }
    }
}

void main()
{
    int n;
    int x;
    printf("nhap slpt : ");
    scanf("%d",&n);
    int a[n];
    nhapmang(a, n);
    xuatmang(a, n);
    timvitringtulonhon23(a, n);
}