Program to convert spaces to newlines doesn't compile

This is my whole file that I'm trying to compile:

Code:

---

#include <stdio.h>


static int MAXIM = 100;


void main() {
  char sentence[MAXIM];
  printf("Your sentence?: ");
  scanf("%s", sentence);


  printf("\n");
 
  for( int i = 0  ; i == MAXIM ; i++ ) {
    char ch = sentence[i];
    if (ch = " ")
      printf("\n");
    else
      printf("%c", ch);
  }
}

---

Running that through GCC will

Code:

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stuff.c In function `main':
space.c:14:12: warning: assignment to `char' from `char *' makes integer from pointer without a cast [-Wint-conversion]
  14 |    if (ch = " ")
      |            ^

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What'd I do wrong?

Two things in this line:

Code:

---

if (ch = " ")

---

First, a space within quotes is treated as a C-string (char *). That's the meaning behind the error. You need to use single quotes for a character.
Second, you are not comparing in that statement, you are assigning (as the error says). = for assignment, == for comparison.

Don't forget the rest of the errors.

Code:

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$ gcc -Wall main.c
main.c:7:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
 void main() {
      ^
main.c: In function ‘main’:
main.c:17:12: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
    if (ch = " ")
            ^
main.c:17:5: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if (ch = " ")
    ^

---

Quote:

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Originally Posted by rags_to_riches

Two things in this line:

Code:

---

if (ch = " ")

---

First, a space within quotes is treated as a C-string (char *). That's the meaning behind the error. You need to use single quotes for a character.
Second, you are not comparing in that statement, you are assigning (as the error says). = for assignment, == for comparison.

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Turns out it wasn't just any old error; it was a stupid error.

The program now compiles, but doesn't print the sentence. It doesn't even print the appropriate newlines.

That's because now that you've fixed the syntax errors, you still have a logic error to fix. Carefully step through your loop with some test input to see what happens (or does not happen).

Your: for( int i = 0 ; i == MAXIM ; i++ )
Better could be:
for( int i = 0 ; i < MAXIM ; i++ )