Question#1: Write a C program that prints out the max and min values of the data

Question

Question#1: Write a C program that prints out the max and min values of the data file included below. Instead of using computations within the main function like the problem in previous homework, use the programmer-define functions (reference functions with function prototypes) to solve it. You can choose anyone of the three data file structures (counter, sentinel, and neither counter/sentinel) to be included in your solution.

Program #1
130.5
140.4
140
150
160.9
170
180
150
150.1
190

Program #2
120
140.8
121
-160.9
130.4
190.4
150.6
110
170.7
180

Program #3
140
150.2
160.3
170
180
190
-110
120.1
130
170

Question#2: Write a C program that generates 50 floating-point random numbers in a range from 0 to 10,000 using different seed values. Five floating-point random numbers per line are required to be displayed on the output.

Question#3: Write a C program that generates 40 integer random numbers in a range from 0 to 1,000 using different seed values. Four integer random numbers per line are required to be displayed on the output.

***turn in the computer print outs of the C programs, and the compiling steps.

Explanation / Answer

#1)
/**C program that reads a text file "input.txt"
and prints maximum and minimum values to console*/
#include<stdio.h>
#include<conio.h>
//Set constant
const int SIZE =10;
//functions prototypes
void readFile(FILE* fp,double arr[]);
double getMax(double arr[]);
double getMin(double arr[]);
int main()
{

   FILE *fp;
   fp=fopen("input.txt","r");

   if(!fp)
   {
       printf("File doesn't exist. ");
       getch();
       return 0;
   }

   double arr[SIZE];
   //calling readFile
   readFile(fp,arr);

   //calling getMax
   printf("Maximum : %5.2f ",getMax(arr));
   //calling getMin
   printf("Minimum : %5.2f ",getMin(arr));

   //pause the program output on console
   getch();
   return 0;
}

//The method readFile that takes FILE pointer and array
//and read the array values
void readFile(FILE* fp,double arr[])
{
   int index=0;
   while(index<SIZE)
   {
       fscanf(fp,"%lf",&arr[index]);
       index++;
   }

   fclose(fp);

}

//Returns the maximum value in array
double getMax(double arr[])
{
   double max=arr[0];
   int index;
   for(index=1;index<SIZE;index++)
   {
       if(arr[index]>max)
           max=arr[index];
   }

   return max;
}
//Returns the minimum value in array
double getMin(double arr[])
{
   double min=arr[0];
   int index;
   for(index=1;index<SIZE;index++)
   {
       if(arr[index]<min)
           min=arr[index];
   }

   return min;
}
Sample output:
Maximum : 190.00
Minimum : 130.50

----------------------------------------------------------------------------------------------------
#2)
/**C program that generates 50 random numbers in a range of 0 to 10000
and print to console.*/
//header files
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>
//Set constant
const int SIZE =50;
//functions prototypes
int main()
{

   //create an array of size 50
   double arr[SIZE];
   //seed a random value
   srand(time_t(NULL));
   int index;
   int count=1;
   for(index=0;index<SIZE;index++)
   {
       arr[index]=rand()%10000;
   }

   //print 4 random numbers per line
   for(index=0;index<SIZE;index++)
   {
       printf("%10.2f",arr[index]);
                  
       if(count%5==0)
           printf(" ");      

       count++;          
   }

   //pause the program output on console
   getch();
   return 0;
}
sample output:
     38.00   7719.00   1238.00   2437.00   8855.00
   1797.00   8365.00   2285.00    450.00    612.00
   5853.00   8100.00   1142.00    281.00    537.00
   5921.00   8945.00   6285.00   2997.00   4680.00
    976.00   1891.00   1655.00   5906.00   8457.00
   1323.00   8881.00   2240.00   9725.00   2278.00
   2446.00    590.00    840.00   8587.00   6907.00
   1237.00   3611.00   2617.00   2456.00    867.00
   9533.00   6878.00   8223.00   7887.00   1597.00
    584.00   2212.00   1111.00   7578.00   7066.00

------------------------------------------------------------------------------------------------
#3)
/**C program that generates 40 random numbers in a range of 0 to 1000
and print 4 random numbers per line to console.*/
//header files
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>
//Set constant
const int SIZE =40;
//functions prototypes
int main()
{

   //create an array of size 50
   int arr[SIZE];
   //seed a random value
   srand(time_t(NULL));
   int index;
   int count=1;
   for(index=0;index<SIZE;index++)
   {
       arr[index]=rand()%1000;
   }

   //print 4 random numbers per line
   for(index=0;index<SIZE;index++)
   {
       printf("%10d",arr[index]);
                  
       if(count%4==0)
           printf(" ");      
       count++;          
   }
  
   //pause the program output on console
   getch();
   return 0;
}
sample output:
        38       719       238       437
       855       797       365       285
       450       612       853       100
       142       281       537       921
       945       285       997       680
       976       891       655       906
       457       323       881       240
       725       278       446       590
       840       587       907       237
       611       617       456       867

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