69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
#include <detpic32.h>
|
|
|
|
#define SIZE 20
|
|
|
|
char *strcat(char *, char *);
|
|
char *strcpy(char *, char *);
|
|
int strlen(char *);
|
|
int strcmp(char *str1, char *str2);
|
|
|
|
int main(void) {
|
|
static char str1[SIZE + 1];
|
|
static char str2[SIZE + 1];
|
|
static char str3[2 * SIZE + 1];
|
|
|
|
printStr("Introduza 2 strings:\n");
|
|
readStr(str1, SIZE);
|
|
putChar('\n');
|
|
readStr(str2, SIZE);
|
|
putChar('\n');
|
|
printStr("Resultados:\n");
|
|
printStr("Str1 len: ");
|
|
printInt(strlen(str1), 10);
|
|
putChar('\n');
|
|
printStr("Str2 len: ");
|
|
printInt(strlen(str2), 10);
|
|
putChar('\n');
|
|
strcpy(str3, str1);
|
|
printStr("Str3 + Str2: ");
|
|
printStr(strcat(str3, str2));
|
|
putChar('\n');
|
|
printStr("Str1 == Str2: ");
|
|
printInt10(strcmp(str1, str2));
|
|
putChar('\n');
|
|
return 0;
|
|
}
|
|
// Returns the length of string "str" (excluding the null character)
|
|
int strlen(char *str) {
|
|
int len;
|
|
for (len = 0; *str != '\0'; len++, str++);
|
|
return len;
|
|
}
|
|
// Copy the string pointed by "src" (including the null character) to
|
|
// destination (pointed by "dst")
|
|
char *strcpy(char *dst, char *src) {
|
|
char *p = dst;
|
|
for (; (*dst = *src) != '\0'; dst++, src++);
|
|
return p;
|
|
}
|
|
// Concatenates "dst" and "src" strings
|
|
// The result is stored in the "dst" string
|
|
char *strcat(char *dst, char *src) {
|
|
char *p = dst;
|
|
for (; *dst != '\0'; dst++);
|
|
strcpy(dst, src);
|
|
return p;
|
|
}
|
|
|
|
// Compares two strings, character by character
|
|
// Returned value is:
|
|
// < 0 string "str1" is "less than" string "str2" (first
|
|
// non-matching character in str1 is lower, in ASCII, than that of str2)
|
|
// = 0 string "str1" is equal to string "str2"
|
|
// > 0 string "str1" is "greater than" string "str2" (first
|
|
// non-matching character in str1 is greater, in ASCII, than that of str2)
|
|
int strcmp(char *str1, char *str2) {
|
|
for (; (*str1 == *str2) && (*str1 != '\0'); str1++, str2++);
|
|
return (*str1 - *str2);
|
|
}
|