1)Use function GetUserInfo to get a user\'s information. If user enters 20 and H

Question

1)Use function GetUserInfo to get a user's information. If user enters 20 and Holly, sample program output is:

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

void GetUserInfo(int* userAge, char userName[]) {
   printf("Enter your age: ");
   scanf("%d", userAge);
   printf("Enter your name: ");
   scanf("%s", userName);
   return;
}

int main(void) {
   int userAge = 0;
   char userName[30] = "";

   /* Your solution goes here */

   printf("%s is %d years old. ", userName, userAge);

   return 0;
}


2)Complete the function to replace any period by an exclamation point. Ex: "Hello. I'm Miley. Nice to meet you." becomes:

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

void MakeSentenceExcited(char* sentenceText) {
   /* Your solution goes here */
}

int main(void) {
   const int TEST_STR_SIZE = 50;
   char testStr[TEST_STR_SIZE];

   strcpy(testStr, "Hello. I'm Miley. Nice to meet you.");
   MakeSentenceExcited(testStr);
   printf("%s", testStr);

   return 0;
}


3)

Write a function SwapArrayEnds() that swaps the first and last elements of its array parameter. Ex: sortArray = {10, 20, 30, 40}

becomes {40, 20, 30, 10}. The array's size may differ from 4

#include <stdio.h>

/* Your solution goes here */

int main(void) {
   const int SORT_ARR_SIZE = 4;
   int sortArray[SORT_ARR_SIZE];
   int i = 0;

   sortArray[0] = 10;
   sortArray[1] = 20;
   sortArray[2] = 30;
   sortArray[3] = 40;

   SwapArrayEnds(sortArray, SORT_ARR_SIZE);

   for (i = 0; i < SORT_ARR_SIZE; ++i) {
      printf("%d ", sortArray[i]);
   }
   printf(" ");

   return 0;
}

Explanation / Answer

1.

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

void GetUserInfo(int* userAge, char userName[]) {
printf("Enter your age: ");
scanf("%d", userAge);
printf("Enter your name: ");
scanf("%s", userName);
return;
}

int main(void) {
int userAge = 0;
char userName[30] = "";

GetUserInfo(&userAge, userName);

printf("%s is %d years old. ", userName, userAge);

return 0;
}

2.

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

void MakeSentenceExcited(char* sentenceText) {
int i=0;
  
while(sentenceText[i] != '')
{
if(sentenceText[i] == '.')
sentenceText[i] = '!';
  
i++;
}
  
}

int main(void) {
const int TEST_STR_SIZE = 50;
char testStr[TEST_STR_SIZE];

strcpy(testStr, "Hello. I'm Miley. Nice to meet you.");
MakeSentenceExcited(testStr);
printf("%s", testStr);

return 0;
}

3.

#include <stdio.h>

void SwapArrayEnds(int *arr, int size)
{
int temp = arr[0];
arr[0] = arr[size-1];
arr[size-1] = temp;
}

int main(void) {
const int SORT_ARR_SIZE = 4;
int sortArray[SORT_ARR_SIZE];
int i = 0;

sortArray[0] = 10;
sortArray[1] = 20;
sortArray[2] = 30;
sortArray[3] = 40;

SwapArrayEnds(sortArray, SORT_ARR_SIZE);

for (i = 0; i < SORT_ARR_SIZE; ++i) {
printf("%d ", sortArray[i]);
}
printf(" ");

return 0;
}

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