C code for Intermediate Cocomo Model

//C program to calculate effort, development time, productivity and average staff required in Intermediate cocomo model//

#include<stdio.h>
#include<conio.h>
#include<math.h>
int fround(float x)
{
  int a;
  x=x+0.5;
  a=x;
  return(a);
}

void main()
{
  float table[3][4]={3.2,1.05,2.5,0.38,3.0,1.12,2.5,0.35,2.8,1.20,2.5,0.32};
  int i,j,size,model,rating;
  char mode[][15]={"Organic","Semi-Detached","Embedded"};
  char driver[15][6]={"RELY","DATA","CPLX","TIME","STOR","VIRT","TURN","ACAP","AEXP","PCAP",
  "VEXP","LEXP","MODP","TOOL","SCED"};
  float effort,EAF,a,time,staff,productivity;
  float costdrivers[15][6]={
                {0.75,0.88,1,1.15,1.40,-1},
                {-1,0.94,1,1.08,1.16,-1},
                {0.70,0.85,1,15,1.30,1.65},

                {-1,-1,1,1.11,1.30,1.66},
                {-1,-1,1,1.06,1.21,1.56},
                {-1,0.87,1,1.15,1.30,-1},
                {-1,0.87,1,1.07,1.15,-1},

                {1.46,1.19,1,0.86,0.71,-1},
                {1.29,1.13,1.00,0.91,0.82,-1},
                {1.42,1.17,1,0.86,0.70,-1},
                {1.21,1.10,1,0.90,-1,-1},
                {1.14,1.07,1,0.95,-1,-1},

                {1.24,1.10,1.00,0.91,0.82,-1},
                {1.24,1.10,1,0.91,0.83,-1},
                {1.23,1.08,1,1.04,1.10,-1}
                };

  clrscr();
  printf("
Enter the size of project : ");
  scanf("%d",&size);
  if(size>=2 && size<=50)
    model=0;
  else if(size>50 && size<=300)
    model=1;
  else if(size>300)
    model=2;
  printf("
Mode = %s",mode[model]);
  EAF=1;

  for(i=0;i<15;i++)
  {
    do
    {
    printf("
Rate cost driver %s on scale of 0-5 : ",driver[i]);
    printf("
0-Very Low 1-Low 2-Nominal 3-High 4-Very High 5-Extra High
");

    scanf("%d",&rating);
    a=costdrivers[i][rating];
    if(a==-1)
    {
       printf("
No value exist for this rating..Enter another rating...
");
    }
    }while(a==-1);
    EAF=EAF*a;
  }
  printf("
EAF = %f",EAF);
  effort=(table[model][0]*pow(size,table[model][1])) * EAF;
  time=table[model][2]*pow(effort,table[model][3]);
  staff=effort/time;
  productivity=size/effort;

  printf("

Effort = %f Person-Month",effort);
  printf("
Development Time = %f Months",time);
  printf("
Average Staff Required = %d Persons",fround(staff));
  printf("
Productivity = %f KLOC/Person-Month",productivity);
getch();
}

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