C Delete last character in string - c

Question

I want to delete last character in string
first, i use strtok function
My Input is : "Hello World Yaho"
I use " " as my delimeter
My expectation is this
Hell
Worl
Yah
But the actual output is this
Hello
Worl
Yaho
How can I solve this problem? I can't understand this output
this is my code
int main(int argc, char*argv[])
{
char *string;
char *ptr;
string = (char*)malloc(100);
puts("Input a String");
fgets(string,100,stdin);
printf("Before calling a function: %s]n", string);
ptr = strtok(string," ");
printf("%s\n", ptr);
while(ptr=strtok(NULL, " "))
{
ptr[strlen(ptr)-1]=0;
printf("%s\n", ptr);
}
return 0;
}

Answer 1

This program deletes the last character of every word.
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(int argc, char*argv[]){
char *string;
char *ptr;
string = (char*)malloc(100);
puts("Input a String");
fgets(string,100,stdin);
printf("Before calling a function: %s\n", string);
string[strlen(string)-1]=0;
ptr = strtok(string," ");
printf("%s\n", ptr);
while(ptr){
ptr[strlen(ptr)-1]=0;
printf("%s\n", ptr);
ptr = strtok(0, " ");
}
return 0;
}
You must remember to
Trim the string from trailing newline
Use strtok properly
Test
Input a String
Hello World Yaho
Before calling a function: Hello World Yaho
Hello
Hell
Worl
Yah

Answer 2

Your problem is best solved by splitting it in 2 phases: parsing the phrase into words on one hand, with strtok if you wish, and printing the words with their last character omitted in a separate function:
#include <stdio.h>
#include <string.h>
static void print_truncated_word(const char *ptr) {
int len = strlen(ptr);
if (len > 0) len -= 1;
printf("%.*s", len, ptr);
}
int main(int argc, char*argv[]) {
char buf[128];
char *ptr;
puts("Input a string: ");
if (fgets(buf, sizeof buf, stdin) == NULL) {
/* premature end of file */
exit(1);
}
printf("Before calling a function: %s\n", string);
ptr = strtok(string, " \n");
while (ptr) {
print_truncated_word(ptr);
ptr = strtok(NULL, " \n");
}
return 0;
}
Note that the print_truncated_word function does not modify the buffer. Side effects on input arguments should be avoided, unless they are the explicit goal of the function. strtok is ill behaved to this regard, among other shortcomings such as its hidden state that prevents nested use.

Answer 3

Since you kept the delm as space it will create separate tokens for space separated words in your string and c-style strings contain their last characters as '\0' i.e null character so it deletes that character and not your last character in the text.
check this out
http://www.cprogramming.com/tutorial/c/lesson9.html
it turns out that C-style strings are always terminated with a null character, literally a '\0' character (with the value of 0),