How do I read hex numbers into an unsigned int in C [Solved]
- by sil3nt
I'm wanting to read hex numbers from a text file into an unsigned integer so that I can execute Machine instructions. It's just a simulation type thing that looks inside the text file and according to the values and its corresponding instruction outputs the new values in the registers.
For example, the instructions would be:
1RXY - Save register R with value in
memory address XY
2RXY - Save register R with value XY
BRXY - Jump to register R if xy is
this and that etc..
ARXY - AND register R with value at
memory address XY
The text file contains something like this each in a new line. (in hexidecimal)
120F
B007
290B
My problem is copying each individual instruction into an unsigned integer...how do I do this?
#include <stdio.h>
int main(){
FILE *f;
unsigned int num[80];
f=fopen("values.txt","r");
if (f==NULL){
printf("file doesnt exist?!");
}
int i=0;
while (fscanf(f,"%x",num[i]) != EOF){
fscanf(f,"%x",num[i]);
i++;
}
fclose(f);
printf("%x",num[0]);
}
