Script started on Wed Sep 10 17:23:25 2025
mweeks@air:c_ch2$ echo attendance code: 8080
attendance code: 8080
mweeks@air:c_ch2$ uname -m
x86_64
mweeks@air:c_ch2$ cat checkTSize.c 
#include <stdio.h>

int main() {

    printf("Type char in C has %lu bytes\n", sizeof(char));
    printf("Type short in C has %lu bytes\n", sizeof(short));
    printf("Type int in C has %lu bytes\n",  sizeof(int));
    printf("Type long in C has %lu bytes\n", sizeof(long));
    printf("Type long long in C has %lu bytes\n", sizeof(long long));
    printf("Type float in C has %lu bytes\n", sizeof(float));
    printf("Type double in C has %lu bytes\n", sizeof(double));
    printf("Type long double in C has %lu bytes\n", sizeof(long double));
}

mweeks@air:c_ch2$ gcc checkTSize.c 
mweeks@air:c_ch2$ ./a.out
Type char in C has 1 bytes
Type short in C has 2 bytes
Type int in C has 4 bytes
Type long in C has 8 bytes
Type long long in C has 8 bytes
Type float in C has 4 bytes
Type double in C has 8 bytes
Type long double in C has 16 bytes
mweeks@air:c_ch2$ echo 8 bit value 
8 bit value
mweeks@air:c_ch2$ echo 0000 0000 
0000 0000
mweeks@air:c_ch2$ echo 0000 0001
0000 0001
mweeks@air:c_ch2$ echo 0000 0010
0000 0010
mweeks@air:c_ch2$ echo 0000 0011
0000 0011
mweeks@air:c_ch2$ echo 1111 1111
1111 1111
mweeks@air:c_ch2$ echo add 1 
add 1
mweeks@air:c_ch2$ echo 0000 0000
0000 0000
mweeks@air:c_ch2$ echo 256 total
256 total
mweeks@air:c_ch2$ echo "2^8 = 256"
2^8 = 256
mweeks@air:c_ch2$ echo 2s complement of 1111 1111 is 1s comp, then add 1
2s complement of 1111 1111 is 1s comp, then add 1
mweeks@air:c_ch2$ echo 1111 1111 when 1s comp: 0000 0000
1111 1111 when 1s comp: 0000 0000
mweeks@air:c_ch2$ echo add 1: 0000 0001
add 1: 0000 0001
mweeks@air:c_ch2$ vi numbers.txt
mweeks@air:c_ch2$ cat numbers.txt 

4bit 
system un   signed
0000    0    0
0001    1    1 
0010    2    2
0011    3    3
0100    4    4
0101    5    5
0110    6    6
0111    7    7
1000    8   -8 
1001    9   -7 
1010   10   -6
1011   11   -5
1100   12   -4 
1101   13   -3
1110   14   -2 
1111   15   -1

1110 -> 1s comp: 0001, add 1: 0010

4 bit system: range from 0..15 (unsigned)
              range from -8..7 (signed)

mweeks@air:c_ch2$ echo ASCII stands for American Standard Code for Information Interchange
ASCII stands for American Standard Code for Information Interchange
mweeks@air:c_ch2$ echo "-3.14x10^0"
-3.14x10^0
mweeks@air:c_ch2$ echo "-1.01010010111x2^00000000"
-1.01010010111x2^00000000
mweeks@air:c_ch2$ cat testfloat3.c
#include <stdio.h>

int main() {
    int v;
    v = 17;
    printf(" 17 Value is %d \n", v);
    v = 017;
    printf(" 017 Value is %d \n", v);
    v = 0x17;
    printf(" 0x17 Value is %d \n", v);
    long int v2 = 17L;
    printf(" 17L Value is %ld \n", v2);
   
    return 0;
}

mweeks@air:c_ch2$ gcc testfloat3.c 
mweeks@air:c_ch2$ ./a.out
 17 Value is 17 
 017 Value is 15 
 0x17 Value is 23 
 17L Value is 17 
mweeks@air:c_ch2$ exit
exit

Script done on Wed Sep 10 19:04:05 2025