nested loop

[volunteerguy]

one more quick question, this isn't complicated but somehow i'm causing infinnite loop when i attempt it. given the following code...

starting after the first printf i need everything else to loop, any ideas using a nested loop? thanks!

 #inclde<stdio.h> 
 
#define START_CHAR ' '
#define END_CHAR '.'
 
int check_sum(int sum);
 
int main(void) {
int char_code,sum,checksum,x;
char letter;
 
printf("Enter a message ending in a period; or a period only to quit.\n\n");
 
for(sum = 0; char_code != (int)END_CHAR; sum += char_code) {
scanf(" %c", &letter);
char_code = (int)letter;
}
 
checksum = check_sum(sum);
 
printf("Checksum: %c %d\n", (char)checksum, (int)checksum);
 
return(0);
 
}

[ssharish]

It donst look to me like it is giving you some problem. It will work fine and it is working fine in my system.

the only suggestion which i can give is avoid using scanf() function. for reading a char. instead use getchar()!!!

ssharish

[volunteerguy]

It donst look to me like it is giving you some problem. It will work fine and it is working fine in my system.

the only suggestion which i can give is avoid using scanf() function. for reading a char. instead use getchar()!!!

ssharish

haha yes i've been told to stay away from scanf, but for this particular program that is what is supposed to be used... don't ask me

and what i have there does run and execute fine, its getting what I have there to loop that is giving me problems.

i.e. i want to add another loop outside of my current for loop, that executes just after my first printf, and then will continue looping the entire program until solely a period is entered. Once scanf reads a line with soley a period the program should terminate.

[ssharish]

So u mean after a user has entered a string or a char followed with the period which terminated the string. After that, u wanted again to to read a string. Is that right. If that was the case.

#include<stdio.h>

void clear_buffer(void);

int main()
{
    char string[25];
    int choice=1;
    
    while(choice)
    {
        printf("Enter a string\n?");
        fgets(string, 25, stdin);
        
        printf("You entered %s\n",string);
        
        printf("Press 1 to continue and 0 for exit\n");
        scanf("%d", &choice);  // <-- Note this here
        clear_buffer();
    }
    return 0;
}

/* This is a function which is used to clear the input buffer */ 
/* You might need this sort of routine in the future */

void clear_buffer(void)
{
    int ch;
    
    while((ch=getchar())!='\n' && ch != EOF);
}  

/* my output
Enter a string
?hello
You entered hello

Press 1 to continue and 0 for exit
1
Enter a string
?there
You entered there

Press 1 to continue and 0 for exit
0
*/

ssharish