CSC373/406: Example: Two's Complement [2/8]

file:unsigned1.c [source]

00001: #include <stdio.h> 00002: 00003: int main() { 00004: int i; 00005: int x; 00006: unsigned int y; 00007: 00008: printf("-1 signed and unsigned\n"); 00009: x = -1; 00010: printf("%d %u\n", x, x); 00011: 00012: 00013: printf("\ngoing up\n"); 00014: x = 1; 00015: y = 1; 00016: for (i=0; i<=32; i++) { 00017: printf("%12d %12u\n", x, y); 00018: x <<= 1; 00019: y <<= 1; 00020: } 00021: 00022: printf("\ngoing down\n"); 00023: x = 1<<31; 00024: y = 1<<31; 00025: for (i=0; i<=32; i++) { 00026: printf("%12d %12u\n", x, y); 00027: x >>= 1; 00028: y >>= 1; 00029: } 00030: return 0; 00031: } 00032:

file:unsigned2.c [source]

00001: #include <stdio.h> 00002: 00003: int main() { 00004: unsigned int x=1; 00005: int i; 00006: for (i=0; i<28; i++) { 00007: x *= 3; 00008: printf("%u\n", x); 00009: } 00010: return 0; 00011: } 00012:

file:twoscomplement1.c [source]

00001: #include <stdio.h> 00002: #include <math.h> 00003: #include "show-bytes.c" 00004: 00005: int main() { 00006: int x; 00007: printf("Enter an integer\n"); 00008: scanf("%d", &x); 00009: printf("%d in 2's complement is ", x); 00010: show_bytes((byte_pointer) &x, sizeof x); 00011: printf("\n"); 00012: return 0; 00013: } 00014:

file:twoscomplement2.c [source]

00001: #include <stdio.h> 00002: 00003: int main() { 00004: int x=1; 00005: int i; 00006: for (i=0; i<28; i++) { 00007: x *= 3; 00008: printf("%d\n", x); 00009: } 00010: return 0; 00011: } 00012: