Dev C++ program closes immediately when entering letters - c++

Question

My program closes immediately when I enter a letter. It shows the rest of the code but I do not get to enter the other parts of it. The program closes immediately when entering letters but remains when entering numbers, up until the part where the program is supposed to show the copied information. I have tried putting getchar(); after every cin<<a; but it skips lines and I only get to enter few info. Here is my code:
* I am an extreme newbie, this is by far the longest code I've ever worked on.
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string>
using namespace std;
int main()
{
string a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,y,z;
cout<<"Enter Your Name:";
cin>>a;
cout<<"Enter Your Gender:";
cin>>z;
cout<<"Enter Your Age:";
cin>>b;
cout<<"Enter Your Address:";
cin>>c;
cout<<"Enter Your School:";
cin>>d;
cout<<"Enter Your Nickname:";
cin>>e;
cout<<"Enter Highest Educational Attainment:";
cin>>f;
cout<<"What are your skills?:";
cin>>g;
cout<<"How many years experience do you have in this field?:";
cin>>h;
cout<<"What kind of people would you like to have in the workplace?:";
cin>>i;
cout<<"What good values do you have?:";
cin>>j;
cout<<"What bad values do you have?:";
cin>>k;
cout<<"When is your birthday?:";
cin>>l;
cout<<"What is your Father's name?:";
cin>>m;
cout<<"What is your Mother's name?:";
cin>>n;
cout<<"Do you have any children?:";
cin>>o;
cout<<"What is your eye color?:";
cin>>y;
cout<<"What do you dislike?:";
cin>>p;
cout<<"How many are you in the family?:";
cin>>q;
cout<<"What is your favorite food?:";
cin>>r;
cout<<"Your name is:"<<a<<endl;
cout<<"You are a:"<<z<<endl;
cout<<"You are"<<b<<cout<<"years old."<<endl;
cout<<"You live in:"<<c<<endl;
cout<<"You studied in:"<<d<<endl;
cout<<"Your nickname is:"<<e<<endl;
cout<<"Your highest educational attainment is:"<<f<<endl;
cout<<"Your skills are:"<<g<<endl;
cout<<"You have"<<h<<cout<<"years of experience in this field."<<endl;
cout<<"You would like to have"<<i<<cout<<"in the workplace."<<endl;
cout<<"The good thing is, you are:"<<j<<endl;
cout<<"The bad thing is, you are also:"<<k<<endl;
cout<<"Your birthday is in:"<<l<<endl;
cout<<"Your father is:"<<m<<endl;
cout<<"Your mother is:"<<n<<endl;
cout<<"You have"<<o<<cout<<"children."<<endl;
cout<<"You have"<<y<<"eyes."<<endl;
cout<<"You dislike:"<<p<<endl;
cout<<"You are"<<q<<cout<<"in the family"<<endl;
cout<<"Your favorite food is:"<<r<<endl;
return 0;
system ("pause");
}
*Edit: Replaced float with string and added #include <string> at the start of the code. The only problem now is the program closing when it is supposed to show the output and when entering a space in the input the next questions are in one line.

Answer 1

if x is a float type or an integer type
std::cin >> x;
reads no letter from std::cin if std::cin starts with a character that cannot be a prefix for a float or an integer type.
So x remains to 0 and your input stream remains unchanged.
For the next
std::cin >> y;
with y of type float or integer, the same behavior occurs: y remains to 0 and your input stream std::cin still starts with a character that cannot be read by a float or an integer type.
This behavior goes on until the end of your program.

Answer 2

float a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,y,z;
Variable a and other of type float. Which means they can store values like 1,10.0,12.3546 e.t.c. As soon as you enter any invalid character for this data type this program will exit.
If you want to run your program try declaring all variable as std::string and take input via getline like this getline(std::cin,var).
P.S : I have assumed here that var is of type string.