Thread: need help with strings and str functions

im working on a program for my advanced c programming class in college and im having trouble. in this program we have to make a program that counts the number of repeated characters in a string. if there are 4 repeated chars it is supposed to print out the string with a * at the end. if it has 5 repeated chars it has to print the string with ** at the end. so far i've been working on a string "mississippi".

Code:

char string[] = "mississippi";
char *token;
int count=0;
	
	
printf("%s \n", string);


token = strchr(string, 's');
printf("%s\n", token);
count++;
while(token != NULL){
token = strchr(token+1, 's');
printf("%s\n", token);
count++;}

printf("%d",count);

with this i would like to see how many 's' characters there are in mississippi, but i keep getting 5 instead of 4 because it keeps counting null for some reason. any ideas? also on how to make it count each letter in a string?

right now you are incrementing count 5 times, once at every s and once at the character that is one passed the last s. even though after the last s you're token does equal NULL it still has to finish the loop and increment the count one last time, just add "if(token != NULL)" right before your count++ to prevent this from happeneing.

Code:

char string[] = "mississippi";
char *token;
int count=0;
	
	
printf("%s \n", string);


token = strchr(string, 's');
printf("%s\n", token);
count++;
while(token != NULL){
token = strchr(token+1, 's');
printf("%s\n", token);
if(token != NULL)
count++;}

printf("%d",count);

thx alot that helped. and how would i make it count each letter, like in the line token = strchr(string, 's'); where i have the 's' is there anythin i can change it to so i could put it in a loop to count the anoubt of m's i's, and so on?

wow nice but one prob lol, we suposed to use str functions while doing that. like as seen above, got it to count for s with the strchr() function but need that code to cycle through all the charcters in the string

what do u mean? just wonderin if u can make the char comparison from token = strchr(string, 's');... the 's' part change some how in a loop. need that to cycle through each of the letters and find out which repeats the most. then i need to strcat a * to the end of the string. im still suck on the finding which repeats the most