Question

How to run for loop with function calls in C

Answer 1

int f() {
    
    static int n = 7;
    
	return n--;
}
 
int main(int argc, char **argv) 
{
	for (f(); f(); f()) {
         printf("%d\n", f());
    }
	
	return 0; 
}
    
      
/*
run:
    
5
2
 
*/

 

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Answer 2

#include <stdio.h>
 
int f(char ch) {
    
    static int n = 7;
    
	// simulation - see how it work
	printf("ch = %c n = %d\n", ch, n);
	
	return n--;
}
 
int main(int argc, char **argv) 
{
	for (f('a'); f('b'); f('c')) {
         printf("%d\n", f('d'));
    }
	
	return 0; 
}
    
      
/*
run:
    
ch = a n = 7
ch = b n = 6
ch = d n = 5
5
ch = c n = 4
ch = b n = 3
ch = d n = 2
2
ch = c n = 1
ch = b n = 0
 
*/

 

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