Question

A character array that was taken from received raw SMS format was {'+','C','M','T',' ','2','0','2','0','-','2','9','-','1','2'}.  Create a program that will extract the date and store it in a character array with the following format {'M','M','/','D','D','/','Y','Y','Y','Y'}.   Use a function aside from main function that  returns a value.  See attached table in the instructions for additional requirement. Use "for loop" using C language.

Answer 1

#include<stdio.h>

#include<stdlib.h>

/*date function returns a char array of date format*/

char *  date(char * sms,int n){

    /*creating a char array of size 10*/

    char * date=(char*)malloc(10*sizeof(char));

    /*i stores index position of sms*/

    int i=0;

    /*index to store year in date array*/

    int yr=0;

    /*index to store year in date array*/

    int mon=0;

    /*index to store day in date array*/

    int day=0;

    /*while loop for iterating through each index*/

    while(i<15){

        /*if char is a number or - */

        if((sms[i]>='0'&&sms[i]<='9')||sms[i]=='-'){

            /*if i is less than 9*/

            if(i<9){

                /*store the year from sms in appropriate position in date*/

                date[6+yr]=sms[i];

                yr++;

            }

            /* if i is 9*/

            else if(i==9){

                /* insert / at index 5 in date*/

                date[5]='/';

            }

            /*if i >=10 and i< =11*/

            else if(i>=10 && i<=11){

                /*insert day from sms into date array*/

                date[3+day]=sms[i];

                day++;

            }

            /* if i is 12  */

            else if(i==12){

                /* insert / at index 2 in date*/

                date[2]='/';

            }

            else{

                /*insert month from sms into date array*/

                date[mon]=sms[i];

                mon++;

            }

        }

        i++;

    }

    return date;

};

int main(){

    /*Sms array*/

    char sms[15]={'+','C','M','T',' ','2','0','2','0','-','2','9','-','1','2'};

    /*invoking date function and storing the date array in date 1*/

    char * date1=date(sms,15);

    /* Printing date */

    printf("%s",date1);

}