#include <stdio.h>

int stringlength(const char*str){
    int length=0;
    while(str[length]!='\0'){
        length++;
    }
    return length;
}
int main(){
    char mystring[]="lacasa de papel";
    int length=stringlength(mystring);
    printf("length of the string;%d\n",length);
    return 0;
}