[travelmate81]

hello people....i just started to learn C so im very new with it....
im trying to calculate to the number of letters that i have in a string
for example :
string = GoforEEeexpeRT
the result should be
the letter is E , 5 times.

so far i tried to this but im getting error when im trying to run it .
can someone help me with it, thanks in advance.

#include <stdio.h>
#define ABC 100
int main()
{
	char st[ABC];
	int a[ABC], i,j;
	
	printf("\nPlease enter the string\n");	
	for (i=0; i<ABC; i++)	 /* initialization */
		a[i]=0;	
	
	j=0;
    while (st[j]!='\0')
	{
		if (st[j]>='A'&& st[j]<='Z')
			st[j]=st[j]+32 ;
		j++;

	}
		i=0; 
		for(i=0;i<ABC;i++)
			for(k=i;k<ABC;k++)
			{
				if (st[k]==st[i])
					a[i]++;
			}

		while(
				i++;
		ch[i] = s[i];
		printf("the letter is %s\n", s);
	}
}