hey I have to turn every letter from a string in capital letter. I don't know how many words there are nor if the first letter is capital or not. this algorithm is not working properly?? Any ideas why? Help please

include <iostream>

include <string.h>

include <fstream>

include <ctype.h>

using namespace std;

ifstream f("atestat.in");

ofstream g("atestat.out");

int main()

{unsigned int n,i,val=32;

char a[50];

f.getline(a,50);

n=strlen(angel);

//a if(a[1]>='a' && a[1]<='z')

cout<<a[1]-val;

else cout<<a[1];

for(i=2;i<=strlen(a);i++)

if((isalpha(a[i-1])==0)&& isalpha(a[i])==1)

cout<<a[i]-val;

else cout<<a[i];

f.close(); g.close(); return 0; }