#include <stdio.h>
#include <string.h>


#define STR_LEN 30
#define N 10

int main(void)

{
    int a[30] [20];


    char str[STR_LEN + 1];
    printf("Enter a sentence in all lowercase letters ending with a ''.'', ''?'', or ''!'' : \n" );
        for(i = 0; i < N; i++)
            scanf("%s", str);


    printf("Reversal of sentence:" );
        for(i = N - 1; i >= 0; i--)
            printf("%d", a[i]);
        printf("\n");











return 0;
}

#include<stdio.h>
#include<string.h>

main()
{
        char grades[30][20];
        int i=0,j=0,k=0;
        char c;
        printf("Enter the sentence : ");
        while((c=getchar()))
        {
                if(c==' ' || c=='\n' || c=='\t')
                {
                 grades[i][j]='\0';  // To add a null the make it as a separate string
                        i++;
                        j=0;
                }
                else
                {
                 grades[i][j]=c; assign the character in the array 
                 j++;
                }

                if(c=='\n')
                        break; terminate if the sentence get over.
        }

        for(j=0;j<i;j++)
                printf("%s\n",grades[j]);
}

#include<stdio.h>  //you'll almost always want this for basic i/o functions, etc.
#include<string.h> //for working with the string functions.

int main()       //in C this should always be int main() for compatibility reasons
{
        char grades[30][20];  //our char array: 30 rows, 20 columns across
        int i=0,j=0,k=0;          //a few int's, all assigned zero value
        char c;                    //a single char 

Question1: What can a single char NEVER become in C?

        printf("Enter the sentence : ");
        while((c=getchar()))  //get one char while they're in the keyboard buffer
        {
                //if the char is a space, newline or tab
                if(c==' ' || c=='\n' || c=='\t')
                {
                 //add the end of string char to the array
                 grades[i][j]='\0';  // To add a null the make it as a separate string
                        i++;            //increment the row number
                        j=0;            //set the column number to zero.
                }
                else                     //it wasn't a space, newline or tab char
                {
                 grades[i][j]=c;      //assign the character in the array 
                 j++;                    //increment the column number, ready for the next char
                }

                if(c=='\n')  
                        break;         //terminate if the sentence is finished.
        }

        for(j=0;j<i;j++)                      //for each row
                printf("%s\n",grades[j]);  //print the string we made

        /* this is the int being returned to the operating system. It can be used to find out
            if the program finished right or not.
        */
        return 0;
}