102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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void fallback_print_usage() {
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printf("Usage: ./convert [int|long|float|double] number\n");
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printf("Example: ./convert float 3.14\n");
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exit(0);
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}
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void print_int(int x) {
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// one character per one bit
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char output[32 + 1] = {
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0,
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};
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/* YOUR CODE START HERE */
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int k;
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unsigned int value = *((unsigned int *)&x);
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size_t bits = 8 * sizeof(int);
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for (k = 0; k < bits; ++k) {
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output[bits - 1 - k] = (value & (1ul << k)) ? '1' : '0';
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}
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/* YOUR CODE END HERE */
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printf("%s\n", output);
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}
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void print_long(long x) {
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// one character per one bit
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char output[64 + 1] = {
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0,
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};
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/* YOUR CODE START HERE */
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int k;
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unsigned long value = *((unsigned long *)&x);
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size_t bits = 8 * sizeof(long);
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for (k = 0; k < bits; ++k) {
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output[bits - 1 - k] = (value & (1ul << k)) ? '1' : '0';
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}
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/* YOUR CODE END HERE */
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printf("%s\n", output);
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}
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void print_float(float x) {
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// one character per one bit
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char output[32 + 1] = {
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0,
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};
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/* YOUR CODE START HERE */
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int k;
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unsigned int value = *((unsigned int *)&x);
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size_t bits = 8 * sizeof(int);
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for (k = 0; k < bits; ++k) {
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output[bits - 1 - k] = (value & (1ul << k)) ? '1' : '0';
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}
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/* YOUR CODE END HERE */
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printf("%s\n", output);
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}
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void print_double(double x) {
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// one character per one bit
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char output[64 + 1] = {
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0,
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};
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/* YOUR CODE START HERE */
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int k;
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unsigned long value = *((unsigned long *)&x);
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size_t bits = 8 * sizeof(long);
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for (k = 0; k < bits; ++k) {
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output[bits - 1 - k] = (value & (1ul << k)) ? '1' : '0';
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}
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/* YOUR CODE END HERE */
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printf("%s\n", output);
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}
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int main(int argc, char **argv) {
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if (argc != 3)
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fallback_print_usage();
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if (strcmp(argv[1], "int") == 0) {
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print_int(atoi(argv[2]));
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} else if (strcmp(argv[1], "long") == 0) {
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print_long(atol(argv[2]));
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} else if (strcmp(argv[1], "float") == 0) {
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print_float(atof(argv[2]));
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} else if (strcmp(argv[1], "double") == 0) {
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print_double(atof(argv[2]));
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} else {
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fallback_print_usage();
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}
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}
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