CODEWITHSUNDEEP
cc-stringsstring-parsing
Tim Jonas
Tim Jonas

Reputation: 228

How do I replace a space with a new line?

How do I replace a space with a newline ("\n") in a string using C?

Upvotes: 2

Views: 7912

Answers (3)

Tim Jonas
Tim Jonas

Reputation: 228

#include <stdio.h>
#include <string.h>
#define SIZE 50

int main(int argc, char **argv)
{
     char string[] = "this is my string";
     size_t length, c;

     length = strlen(string);

     for(c = 0; c < length; ++c)
     {
          if(string[c] == ' ')
          {
               string[c] = '\n';
          }    
     }

     printf("%s\n", string);

     return 0;
}

Upvotes: 4

msc
msc

Reputation: 34608

Simple program:

int c;//return of fgetc type is int

while(EOF!=(c=fgetc(file)))
    putchar(c == ' ' ? '\n ' : c);

Upvotes: 1

chqrlie
chqrlie

Reputation: 144780

Your question is quite vague.

Here is a simplistic filter to change all spaces in the input stream into newlines:

#include <stdio.h>

int main(void) {
    int c;

    while ((c = getchar()) != EOF) {
        putchar(c == ' ' ? '\n' : c);
    }
    return 0;
}

EDIT:

If you are interested in modifying a string, you should be aware that string literals are not modifiable, attempting to modify them has undefined behavior.

You should locate the space characters and store newline characters ('\n') at the corresponding offsets.

You can use a pointer and the strchr() function:

char *p = strchr(string, ' ');
if (p != NULL) {
    *p = '\n';
}

Handling all spaces in a loop:

for (char *p = string; (p = strchr(p, ' ')) != NULL; p++) {
    *p = '\n';
}

Or you can use a for loop with an index variable:

for (size_t i = 0; string[i] != '\0'; i++) {
    if (string[i] == ' ') {
        string[i] = '\n';
        //break;   // uncomment the break if you want a single space changed
    }
}

Upvotes: 3

Related Questions