i wrote a c program of creating a string length counter in C but the code isnt running

Question

//write a c program to make your own version of strlen from <string.h>

#include<stdio.h>

int strlength(char * str){
    char *ptr=str;
    int len=0;
    while(*ptr!='\0'){
        len++;
        str++;
    }
    return len;
}

int main(){
    char str[]="bishal";
    int l=strlength(str);
    printf("the length of the string is %d",l);
    return 0;
}

this was the code i was writing and i dont know why but my text editors wont run it for me plus i cannot see any error on the screenenter image description here

the only error i can see is when i try to run the same in an online compiler , the error looks like this /tmp/zcp4rImwpV.o

if anyone knows the answer to my question then please help.

Answer 1

Instead of incrementing str in your function strlength, increment ptr. Your while loop is running infinitely because ptr never reaches '\0'. Like this:

#include<stdio.h>

int strlength(char * str){
    char *ptr=str;
    int len=0;
    while(*ptr!='\0'){
        len++;
        ptr++;
    }
    return len;
} 

int main(){
    char str[]="bishal";
    int l=strlength(str);
    printf("the length of the string is %d",l);
    return 0;
}