#include<iostream> #include<string> #include<conio.h> #include<stdlib.h> using namespace std; int main(); void show_data(int searchkey); //function used to show data to end-user. void get_data(int i); //function used to obtain data from end-user. void search_student(int searchkey); void add_student(); //This function is used to add record of new student. void edit_student(int idnumber); //function is used to edit existing record. void fullscreen(); int ts; struct student //Structure student is made to store student attributes. { int rollno; string name; string fname; string cell; string dob; string address; }; student rec[50]; //This is basic array of defined structure to sore data. int main() { system("CLS"); system("color B1"); int choice; //int variable used to determine which operation user want to do. int idnumber; //int variable used to record ID number whih user want to edit. int searchkey; //int variable to store student roll_no by which user can search. cout<<"Enter The Total Number of Student(s)- Max 50: "; cin>>ts; while(ts--) { cout<<"\n\t\tWhat do you want to do?"<<endl; cout<<"\t\t----------------------"<<endl; cout<<"\t\t1-Add student"<<endl; cout<<"\t\t2-Edit student"<<endl; cout<<"\t\t3-Search student"<<endl; cout<<"\t\t4-Quit Program"<<endl; cout<<"\t\t----------------------"<<endl; cout<<"Enter your choice: "; cin>>choice; switch(choice) { case 1: //If user presses 1 then student adding module would be displayed. add_student(); break; case 2: //If there are no records in array then it will ask the user to input records first. if(rec[0].rollno==0) { cout<<"Please Add sudents first."<<endl; system("pause"); main(); } else //If records are present in array then it will show table. { cout<<endl; cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"---------------------------Student record Table---------------------------------"<<endl; cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"ID "<<"Roll "<<"Name "<<"Father\tCell no. "<<"DOB "<<"Address\n\n"; cout<<"--------------------------------------------------------------------------------"<<endl; for(int i=0;i<=ts;i++) { show_data(i); //funtion is called with index value to show data. } cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"Which ID number your want to edit: "; cin>>idnumber; //Asking the user at which ID he wants to make a change. if(idnumber>ts || idnumber<0) //Validating the ID number. { cout<<"\nInvalid ID Number."<<endl; } else { edit_student(idnumber); //Passing ID number to Edit Function. } } break; case 3: if(rec[0].rollno==0) //If no record exist then ask the user o enter records first. { cout<<"Please Add sudents first."<<endl; system("pause"); main(); //Return to main so user can input new record. } else { cout<<"Enter roll_no of student you want to search: "; cin>>searchkey; //roll_no as the search key can be entered by user. search_student(searchkey);} break; case 4: return 0; //Terminating the records. break; default: //Default value for ivalid Input. cout<<"Invalid number."<<endl; system("pause"); main(); } } return 0; } void get_data(int i) //Function for receiving data from user and populatiing the variables with values. { cout<<"Enter student roll number in format(1XXX): "; cin>>rec[i].rollno; cout<<"Enter student name: "; cin>>rec[i].name; cout<<"Enter student's Father name: "; cin>>rec[i].fname; cout<<"Enter student's cell phone number: "; cin>>rec[i].cell; cout<<"Enter student's Date of Birth(dd/mm/yyyy): "; cin>>rec[i].dob; cout<<"Enter student's Address: "; cin>>rec[i].address; } void show_data(int searchkey) //Function for showing data on the screen. { int i=searchkey; cout<<i<<" "; cout<<rec[i].rollno<<" "; cout<<rec[i].name<<" "; cout<<rec[i].fname<<"\t"; cout<<rec[i].cell<<" "; cout<<rec[i].dob<<" "; cout<<rec[i].address<<"\n\n"; } void search_student(int searchkey) { for(int i=0;i<=ts;i++) //Loop thrugh complete array. { if(rec[i].rollno==searchkey) //If roll number matches to search term. { cout<<"ID "<<"Roll "<<"Name "<<"Father\tCell no. "<<"DOB "<<"Address\n\n"; show_data(i); //A function is used inside another function. } } } void add_student() //This function is used to add record of new student. { for(int i=0;i<=ts;i++) { get_data(i); //Loop was processed 5 times to get input for 5 students. } system("CLS"); cout<<endl; cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"---------------------------Student record Table---------------------------------"<<endl; cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"ID "<<"Roll "<<"Name "<<"Father\tCell no. "<<"DOB "<<"Address\n\n"; cout<<"--------------------------------------------------------------------------------"<<endl; for(int i=0;i<=ts;i++) { show_data(i); //Loop was processed for 5 times to show obtained records. } cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"---------------------------------FINISH-----------------------------------------"<<endl; cout<<"--------------------------------------------------------------------------------"<<endl; system("pause"); main(); //Return to main function to again show menu. } void edit_student(int idnumber) //function is used to edit existing record. { for(int i=0;i<=ts;i++) //Loop is started. { if(idnumber==i) //Through loop every value is compared with search term. { cout<<"\nExisted information about this record.\n\n"; cout<<"--------------------------------------------------------------------------------"<<endl; cout<<"ID "<<"Roll "<<"Name "<<"Father\tCell no. "<<"DOB "<<"Address\n\n"; cout<<"--------------------------------------------------------------------------------"<<endl; show_data(i); //Load information for existing record. cout<<"\n\nEnter new data for above shown record.\n\n"; get_data(i); //Inputing data for that specific record. cout<<"\n\nRecord updated successfully."<<endl; system("pause"); main(); //Return to main function. } } }
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#include <iostream>
#include <string>
using namespace std;
int main()
{
string name;
cout << "Enter name:";
getline (cin, name);
cout << "Hello " << name;
return 0;
}
C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
//code
}
else {
//code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression){
case value1:
// code
break; // optional
case value2:
// code
break; // optional
......
default:
code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
//code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}