Programming

ganesh@ubuntu:~/my_programs/c/letusc/chap9$ cat fa.c.old
/* Program : write a program to count the number of 'e' in thefollowing array of pointers to strings:

	char *s[] = {
			"We will teach you how to..",
			"Move a mountain",
			"Level a building",
			"Erase the past",
			"Make a million",
			"....all through C!"
		    };
*/

/* Date : 09-June-2010 */

# include <stdio.h>
# include <string.h>

int main(void)
{
        char *s[] = {
                        "We will teach you how to..",
                        "Move a mountain",
                        "Level a building",
                        "Erase the past",
                        "Make a million",
                        "....all through C!"
                    };
	int count=0;
	char *sptr;
	sptr=*s;

		while ( *sptr!='\0' ) {
			if (*sptr=='e') { ++count;}
	        	++(sptr);
		}
	printf("count of e's : %d\n", count); 
	return 0;
}

ganesh@ubuntu:~/my_programs/c/letusc/chap9$ gcc -o fa fa.c
ganesh@ubuntu:~/my_programs/c/letusc/chap9$ ./fa
count of e's : 2

int n;

for(n=0; n<5; n++)
{
  char *str=s[n];
  // count all e's in s
  ...
}

# include <stdio.h>
# include <string.h>

int main(void)
{
char *s[] = {
"We will teach you how to..",
"Move a mountain",
"Level a building",
"Erase the past",
"Make a million",
"....all through C!",
NULL /* Needed to know where to stop! */
};

char **ptr=s;

while( (*ptr) != NULL)
{
  char *str=(*ptr);

  // count e's in str
  ...

  // move to next string
  ptr++;
}

}

# include <stdio.h>
# include <string.h>

int main(void)
{
    char *s[] = {
    "We will teach you how to..",
    "Move a mountain",
    "Level a building",
    "Erase the past",
    "Make a million",
    "....all through C!"
    };

    size_t n = sizeof s/sizeof(char *);
    char **p = s;

    while (n--) {
       puts(*p++);
       // create a counting function here
   }
}

$ ./ramk
.$ ./ramk
We will teach you how to..
Move a mountain
Level a building
Erase the past
Make a million
....all through C!
$