Thread: Need some help Replacing the letters in a string to uppercase.

I had to make code where certain letters of upper case has to change to numbers.

A - 4
B - 8
E - 3
I - 1
O - 0
S - 5

So, for example it would be like this :
This stuff really works ----> TH15 5TUFF R34LLY W0RK5

And that's the code:
insert

Code:

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


 const char* TABLE[] = { "ABEIOS", "483105" };
 
int main(void) {
    char *a;
    char str[1000], *ptr;
    printf("%s\n", "enter the string:");
    if(scanf("%s", &*a) != 1) {
       printf("input error\n");
       exit(EXIT_FAILURE);
   }


     for ( ptr = str; ptr; ++ptr ) {
        *ptr = toupper(*ptr);
     if (( a = strchr(TABLE[0], *ptr) ) != NULL );
       *ptr = (TABLE[1][a - TABLE[0]]);
    }
    
    printf("%s\n", str);
    
}

And then i trying to compile this , i get "Segmentation fault".

How to fix it ?

thx)

&*a is the same as a.
Using scanf with "%s" won't allow you to read a string with spaces.
To read a string with spaces, use scanf with "%999[^\n]" or, far better, use fgets.
Why are you using a in your scanf? Shouldn't you be using str?
Otherwise, your algorithm looks correct.