Question

1. Write a function that converts a string into an int. Assume the int is between 10 and 99. Do not use the atoi() or the stoi() function.

2. Write a function prototype for problem 1.

3. Write a function call for the function you defined in problem 1.

4. Write a function that converts an int between 10 and 99 into a string.

5. Write a function prototype for problem 4.

6. Write a function call for function you defined in problem 4.

7. Declare a 2-dimensional array with 30 rows and 40 columns

8. Write a function that takes the 2-dimensional array argument from problem 7 and assigns the even rows random even numbers between 1 and 100 and assigns the odd rows random odd numbers between 1 and 100.

9. Write a function prototype for problem 8.

10. Write a function call for function you defined in problem 8.

11. What's the output from the following ...

Answer 1

1) int convertToInteger(char str[]) {
  int i, n = 0;
 
  for (i = 0; str[i] != '\0'; i++) {
    n = n * 10 + str[i] - '0';
  }
 return n;
}

(2) Function Prototype

 int convertToInteger(char *str);

(3) Function Call
char str[] = "12";

convertToInteger(str);

4) char *convertToString(int n) {
  char str[3];
   int temp , i=1;
  while (n!=0){
    temp = n%10;
    n = n/10;
    str[i] = temp;
    i = i-1;
   }
  str[2]= '\0';
 return str;
}

(5) Function Prototype

 char *convertToString(int n);

(6) Function Call
int n  = 12;

convertToString(n);


(7) int arr[30][40];

(8)void fun(int arr[30][40]){
   int r ;
   for(int i = 0;i<30;++i){
      for(int j = 0;j<40;++j){

            if(i%2==0){
                r = rand()%99 + 1;
               if(r%2 !=0 )
                  r = r +1;

                arr[i][j] = r;
              }else{
                   

              r = rand()%99 + 1;
               if(r%2 ==0 )
                  r = r +1;

                arr[i][j] = r;

              }
       }
}


9) void fun(int arr[30][40]);

(10)fun(arr)