112 lines
2.0 KiB
C
112 lines
2.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define NO_SIZE 0
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#define INTEGER 1
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#define FLOAT 2
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#define STRING 3
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#define BUFFER_SIZE 256
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void swap(void *a, void *b, size_t size)
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{
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void *tmp;
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tmp = malloc(size);
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memcpy(tmp, a, size);
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memcpy(a, b, size);
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memcpy(b, tmp, size);
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free(tmp);
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}
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void printValue(char *message, void *data, int type)
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{
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printf("%s ", message);
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switch (type)
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{
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case INTEGER:
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printf("%d\n", *((int*) data));
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break;
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case FLOAT:
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printf("%.1f\n", *((float *) data));
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break;
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case STRING:
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printf("%s\n", (char *) data);
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break;
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}
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}
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int main(void)
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{
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int type;
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int validType;
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do
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{
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printf("Choose a data type:\n");
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printf("Integer (1)\n");
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printf("Float (2)\n");
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printf("String (3)\n");
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scanf("%d", &type);
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validType = type >= INTEGER && type <= STRING;
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if (!validType)
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{
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printf("Invalid Data Type\n\n");
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}
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} while (!validType);
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char *format;
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size_t size;
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format = type == INTEGER ? "%d" :
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type == FLOAT ? "%f" :
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type == STRING ? "%255s" :
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NULL;
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size = type == INTEGER ? sizeof(int) :
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type == FLOAT ? sizeof(float) :
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type == STRING ? sizeof(char) * BUFFER_SIZE :
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0;
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if (format == NULL || size == NO_SIZE)
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{
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printf("Invalid Data Type");
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return 1;
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}
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void *a;
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void *b;
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a = malloc(size);
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b = malloc(size);
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printf("\nEnter value A: ");
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scanf(format, a);
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printf("Enter value B: ");
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scanf(format, b);
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printValue("\nA value before: ", a, type);
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printValue("B value before: ", b, type);
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printf("\nSwapping...\n\n");
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swap(a, b, size);
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printValue("A value after: ", a, type);
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printValue("B value after: ", b, type);
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free(a);
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free(b);
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return 0;
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}
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