Question

In C,Write a function maxmin(float x, float * pmax, float * pmin) where x is a new value which is to be compared with the largest and the smallest values pointed to by pmax and pmin, respectively. The function should indirectly update the largest and the smallest values appropriately. Write a program that reads a sequence of numbers and uses the above function to update the maximum and the minimum until end of file, when the maximum and the minimum should be printed.

Answer 1

PROGRAM:

#include <stdio.h>

#include <stdlib.h>

void maxmin(float x, float * pmax, float * pmin)

{

if(x>*pmax)//comparing x with maximum value if x is greater replacing the max with x

{

*pmax=x;

}

if(x<*pmin)//comparing x with minimum value if x is lesser replacing the min with x

{

*pmin=x;

}

}

int main()

{

FILE* file = fopen ("D:/test.txt", "r"); //reading test.txt file from D: drive

float i = 0;

float max=0.0; //considering max to be 0.0 you can place max to be minimum possible value of float

float min=1000.0; //considering min to be 1000.0 you can place min to be maximum possible value of float

//fscanf (file, "%f", &i);

while (!feof (file)) //traversing through file till end of file

{

fscanf (file, "%f", &i); //scanning every float value from file

maxmin(i, &max, &min); //valling the maxmin function and passing max and min in call by reference way

}

printf("%f\n",max);//printing the maximum value

printf("%f",min);//printing the minimum value

fclose (file);//closing the file

return 0;

}

OUTPUT:

test Notepad "DACProgram\ fileread\bin\Debug\fileread.exe" File Edit Format View Help 22.3 23.2 89.5 90.5 0.500000 2.299999 Process returned <0x execution time0.060 Press any key to continue