only functions

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

///teacher structure
typedef struct teacher
{
    char name[15], id[15], room[5], sub[10];///room means class
    float salary;

    struct teacher *next;

}teach;


///student structure
typedef struct student{
    char name[15], id[15], sec[2], Class[5];
    float fees;

    struct student *next;
}stu;


///globally decleared varriables
teach *headT = NULL;
teach *tempT = NULL;
teach *prevT = NULL;

stu *headS = NULL;
stu *tempS = NULL;
stu *prevS = NULL;
int i = 0, countT = 0, countS = 0;
///every code has to be below

///entry area
//teachers data entry
void entryTeacher(){
    int n;
    printf("How many Teachers data you want to enter:");
    scanf("%d", &n);

    for(i = 0; i < n; i++){
       teach *newNode;
       printf("\nEnter data for #%d no Teacher\n",++countT);
       newNode = (teach*)malloc(sizeof(teach));
       printf("\tEnter Teacher Name:");
       scanf("%s", &newNode-> name);
       printf("\tEnter Teachers ID:");
       scanf("%s", &newNode-> id);
       printf("\tEnter Subject:");
       scanf("%s", &newNode-> sub);
       printf("\tEnter Room NO:");
       scanf("%s", &newNode-> room);
       printf("\tEnter salary:");
       scanf("%f", &newNode-> salary);
       newNode-> next = NULL;

       if(headT == NULL){
        headT = newNode;
       }
       else{
        tempT = headT;
        while(tempT-> next != NULL)
            tempT = tempT-> next;
        tempT-> next = newNode;
       }
    }
}//teachers data ends here

//students data entry
void entryStudent(){
    int n;
    printf("How many Students data you want to enter:");
    scanf("%d", &n);

    for(i = 0; i < n; i++){
       stu *newNode;
       printf("\nEnter data for #%d no Student\n",++countS);
       newNode = (stu*)malloc(sizeof(stu));
       printf("\tEnter Student Name:");
       scanf("%s", &newNode-> name);
       printf("\tEnter student ID:");
       scanf("%s", &newNode-> id);
       printf("\tEnter Section:");
       scanf("%s", &newNode-> sec);
       printf("\tEnter Class NO:");
       scanf("%s", &newNode-> Class);
       printf("\tEnter Fees:");
       scanf("%f", &newNode-> fees);

       newNode-> next = NULL;

       if(headS == NULL){
        headS = newNode;
       }
       else{
        tempS = headS;
        while(tempS-> next != NULL)
            tempS = tempS-> next;
        tempS-> next = newNode;
       }
    }
}
//STUDENTS DATA ends here
///printing area
//print teachers info
void printTeacher(){
    printf("\n\t\tDisplay Teachers Information\n");
    tempT = headT;
    printf("Total %d Teachers Data\n", countT);
    while(tempT != NULL){
        printf("\tTeachers ID: %s\n", tempT-> id);
        printf("\tTeachers Name: %s\n", tempT-> name);
        printf("\tAssigned Subject: %s\n", tempT-> sub);
        printf("\tAssigned Room NO: %s\n", tempT-> room);
        printf("\tMonthly Salary: %.2f\n\n", tempT-> salary);
        tempT=tempT->next;
    }
}
//student information display area
void printStudent(){
    printf("\n\t\tDisplay Students Information\n");
    tempS =headS;
    printf("Total %d Students Data\n",countS);
    while(tempS!=NULL)
    {
        printf("\tStudent ID: %s\n",tempS->id);
        printf("\tStudent Name: %s\n",tempS->name);
        printf("\tStudent Section: %s\n",tempS->sec);
        printf("\tStudent Class: %s\n",tempS->Class);
        printf("\tStudent Fees: %.2f\n\n",tempS->fees);
        tempS=tempS->next;
    }

}
///Printing Area ends...!
///searching area
//teachers search code starts here
void searchT(){
    tempT = headT;
    char value[15];
    printf("Enter The Data You Want To search(Name Or ID Or Subject Or Room NO\n");
    printf("\tPlease Enter Your Required Data:");
    scanf("%s", &value);

    while(tempT-> next != NULL && ((strcmp(tempT-> name, value)) && (strcmp(tempT-> id, value)) && (strcmp(tempT-> sub, value)) && (strcmp(tempT-> room, value)) && (strcmp(tempT-> room, value)) ) != 0 )
        tempT = tempT-> next;

        if(tempT == NULL)
            printf("SORRY...! Data Not Found");
        else{
            printf("\nData Found Your Data Should Be below here\n");
            printf("\tTeachers ID: %s\n", tempT-> id);
            printf("\tTeachers Name: %s\n", tempT-> name);
            printf("\tAssigned Subject: %s\n", tempT-> sub);
            printf("\tAssigned Room NO: %s\n", tempT-> room);
            printf("\tMonthly Salary: %.2f\n\n", tempT-> salary);


    }
}
//Teachers search code ends here

//students search code starts here
void searchsS(){
    tempS = headS;
    char value[15];
    printf("Enter The Data You Want To search(Name Or ID Or Section Or Class NO\n");
    printf("\tPlease Enter Your Required Data:");
    scanf("%s", &value);

    while(tempS-> next != NULL && ((strcmp(tempS-> name, value)) && (strcmp(tempS-> id, value)) && (strcmp(tempS-> sec, value)) && (strcmp(tempS-> Class, value)) != 0 ))
        tempS = tempS-> next;

        if(tempS == NULL)
            printf("SORRY...! Data Not Found");
        else{
            printf("\nData Found Your Data Should Be below here\n");
            printf("\tStudent ID: %s\n",tempS->id);
            printf("\tStudent Name: %s\n",tempS->name);
            printf("\tStudent Section: %s\n",tempS->sec);
            printf("\tStudent Class: %s\n",tempS->Class);
            printf("\tStudent Fees: %.2f\n\n",tempS->fees);
        }

}

//students search code ends here
///deleting area
//teachers data delete
void deleteT(){
    tempT = headT;
    char value[15];

    printf("Enter The Data You Want To Delete(Name Or ID Or Subject Or Room NO\n");
    scanf("%s", &value);
    while(tempT-> next != NULL && ((strcmp(tempT-> name, value) != 0) && (strcmp(tempT-> id, value) != 0) && (strcmp(tempT-> sub, value) != 0) && (strcmp(tempT-> room, value) != 0) && (strcmp(tempT-> room, value) != 0) ) != 0 ){
        prevT = tempT;
        tempT= tempT-> next;
    }
    if(tempT == NULL)
        printf("Sorry Data not found\n");
    else {
        if(tempT == headT){
            headT = headT-> next;
            free(tempT);
        }
        else{
            prevT-> next = tempT-> next;
            free(tempT);
        }
        printf("Delete Successful\n");

    }

}
//teachers data delete ends here


//students data delete
void deleteS(){
    tempS = headS;
    char value[15];

    printf("Enter The Data You Want To Delete(Name Or ID Or Subject Or Room NO\n");
    scanf("%s", &value);
    while(tempS-> next != NULL && ((strcmp(tempS-> name, value) != 0) && (strcmp(tempS-> id, value) != 0) && (strcmp(tempS-> sec, value) != 0) && (strcmp(tempS-> Class, value) != 0) ) != 0 ){
        prevS = tempS;
        tempS= tempS-> next;
    }
    if(tempS == NULL)
        printf("Sorry Data not found\n");
    else {
        if(tempS == headS){
            headS = headS-> next;
            free(tempS);
        }
        else{
            prevS-> next = tempS-> next;
            free(tempS);
        }
        printf("Delete Successful\n");

    }

}
//students data delete ends here