I am writing a C program that lists students and adds students, but when I add a new student, although I can read the value successfully, the function can only print the first 2 elements to the screen and cannot read the newly added ones properly.

code is here:

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

typedef char str[50];

typedef struct{
    str name;
    str surname;
    int year;
    int no;
}Student;

void list(Student[2],int sn);

int main() {
    Student students[100] = {
        {"samuel","any",20,111},
        {"veronica","suqal",25,87}
    };

    int sl = 2;

    puts("list, add, exit");
    puts("------------------------n"); 

    str process;

    while(strcmp(process,"exit")) {

        gets(process);

        if(!strcmp(process,"list")) list(students,sl);
        else 
        if(!strcmp(process,"add")) { 

            sl++;

            str name,surname,year,no;

            printf("n name: ");
            gets(name);

            printf("n surname: ");
            gets(surname);

            printf("n year: ");
            gets(year);
            
            printf("n no: ");
            gets(no); 


            strcpy(students[sl].name,name);
            strcpy(students[sl].surname,surname);
            students[sl].no = atoi(no);
            students[sl].year = atoi(year);

            printf("%s %d",name,atoi(no));


        } else if(!strcmp(process,"exit")) { 
            puts("-------exiting--------");

        } 
        
        else
        {
            str out = "not known command: ";
            strcat(out,process);
            puts(out);
        }
    }
    return 0;
};

void list(Student* students,int sn) {
    for(int i=0;i<sn;i++) 
    { 
        Student std = students[i];
        printf("student: n name: %s, surname: %s, years: %d, no: %d n",std.name,std.surname,std.year,std.no);
    }
};

When I add a new element, I can read it on the screen with printf, but when I list it with the function, this happens:

list, add, exit
------------------------

add

 name: hello

 surname: world

 year: 1

 no: 1
hello 1

list
student:
 name: samuel, surname: any, years: 20, no: 111
student:
 name: veronica, surname: suqal, years: 25, no: 87
student:
 name: , surname: , years: 0, no: 0