1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 5 char *right_trim(const char *); 6 7 int main (void) 8 { 9 char str[] = "Hola mundo "; 10 char *dst; 11 12 printf("%s\n", str); 13 printf("len %ld\n", strlen(str)); 14 15 dst = right_trim(str); 16 printf("%s\n", dst); 17 printf("len %ld\n", strlen(dst)); 18 19 free(dst); 20 return 0; 21 } 22 23 char *right_trim(const char *src) 24 { 25 char *dst; 26 size_t i; 27 28 /* Counts blank spaces */ 29 for(i = strlen(src); src[i - 1] == ' '; i--); 30 31 /* +1 for the null character */ 32 if(!(dst = (char *)malloc((i + 1) * sizeof(char)))) 33 return NULL; 34 35 strncpy(dst, src, i); 36 dst[i] = '\0'; 37 return dst; 38 }
