Pranto's problem 1

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

struct student {
    int roll_no;
    char name[50];
    int age;
    char address[200];
};
const int total_student = 5;
struct student s[total_student];

void info_by_name() {
    char test_name[50];
    printf("Enter the name to see the details of the student\n");
    fflush(stdin);
    gets(test_name);
    fflush(stdout);
    int flag = 1;
    for (int i = 0; i < total_student; i++) {
        if (strcmp(test_name, s[i].name) == 0) {
            if (flag) {
                printf("Student's information\n");
            }
            printf("Name: %s\n", s[i].name);
            printf("Roll: %d\n", s[i].roll_no);
            printf("age: %d\n", s[i].age);
            printf("Address: %s\n", s[i].address);
            flag = 0;
        }
    }
    if (flag) {
        printf("No studnet found!\n");
    }
}

void info_by_age() {
    int flag = 1;
    for (int i = 0; i < total_student; i++) {
        if (s[i].age == 14) {
            if (flag) {
                printf("Student's information who have age 14\n");
            }
            printf("%s\n", s[i].name);
            flag = 0;
        }
    }
    if (flag) {
        printf("No studnet found!\n");
    }
}

int main() {
    printf("Enter student information:\n");
    for (int i = 0; i < total_student; i++) {
        printf("Enter roll no: ");
        scanf("%d", &s[i].roll_no);
        printf("Enter name: ");
        fflush(stdin);
        gets(s[i].name);
        fflush(stdout);
        printf("Enter age: ");
        scanf("%d", &s[i].age);
        printf("Enter address: ");
        fflush(stdin);
        gets(s[i].address);
        fflush(stdout);
    }
    info_by_name();
    printf("\n");
    info_by_age();
}