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#include <stdio.h> | |
#include <stdlib.h> | |
#define MAX 1000000 | |
char* get_str(); | |
void sort(char**, int); | |
int main() { | |
// input: amirhosein amir alireza mohsen mohammad | |
int n = 5; | |
char **strings = malloc(n * sizeof(char*)); | |
for(int i =0; i < n; i++) { | |
strings[i] = get_str(); | |
} | |
sort(strings, n); | |
for(int i =0; i < n; i++) { | |
printf("%s\n", strings[i]); | |
} | |
for(int i =0; i < n; i++) | |
free(strings[i]); | |
free(strings); | |
return 0; | |
} | |
void swap(char **a, char **b) { | |
char *temp = *a; | |
*a = *b; | |
*b = temp; | |
} | |
int is_whitespace(char ch) { | |
if(ch == ' ' || ch == '\t' || ch == '\n') | |
return 1; | |
return 0; | |
} | |
void my_strcpy(char *a, char *b){ | |
while((*a++ = *b++)); | |
} | |
int my_strlen(const char *a) { | |
int n; | |
for(n = 0; a[n] ;n++); | |
return n; | |
} | |
char* get_str(){ | |
char *ptr = malloc(MAX* sizeof(char)); | |
char c; | |
while(is_whitespace(c = getchar())); | |
if(c == EOF) { | |
free(ptr); | |
return NULL; | |
} | |
int i; | |
for(i = 0; !is_whitespace(c) && c != EOF; c = getchar(), i++) { | |
ptr[i]=c; | |
} | |
ptr[i] = '\0'; | |
int len = my_strlen(ptr); | |
char *str = malloc((len+1) * sizeof(char)); | |
my_strcpy(str, ptr); | |
free(ptr); | |
return str; | |
} | |
void sort(char **strings, int n){ | |
for(int i = 0 ; i < n; i++) { | |
for(int j = 0; j < n-1; j++) { | |
if(my_strlen(strings[j]) > my_strlen(strings[j+1])) { | |
swap(&strings[j], &strings[j+1]); | |
} | |
} | |
} | |
} |
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