need help

[liquidchaos]

hey, im trying to program a game that lets you buy weapons and sell them on and stuff. obviously more complicated than that but you get my drift. im getting a few errors i cant fix.

function 'glock17' should have a prototype (32)
type mismatch in redeclaration of 'glock17' (106)
misplaced else (149)
misplaced else (159)
function 'weaponm' should have a prototype (190)

cant find anything on prototypes that i can understand

heres the source:

#include<conio.h>
#include<stdio.h>
int glock;
int glockinv;
int suitcase,cash,buysell;
 
 
 
 
                            void glock17()
                            {
                            char howmuch;
                            int glocktemp,glockinv;
 
 
                            printf("would you like to buy(1) or sell(2) some glock17's?\n\n");
                            scanf("%c",&buysell);
                            if(buysell=1)
                            printf("\nHow many would ya like?");
                            {
                            scanf("%i",&glocktemp);
                              if(glocktemp>200)
                             {
                              printf("\nYou cant buy that much\n");
                              getchar();
                              glock17();
                             }
 
                              else if(glocktemp=0)
                              {
                              void weaponsmark();
                              getchar();
                              glock17();
                              }
 
                              else if(cash<(glocktemp*50)
                              {
                              printf("\nYou Don't have enough money");
                              getchar();
                              glock17();
                              }
                              else
                              {
                              glockinv=weapontemp;
                              suitcase=suitcase-glockinv;
                              cash=cash-(glocktemp*50)
                              printf("\nYou have just bought %i Glocks for %i",glockinv,glocktemp);
                              printf("\nYou have %i glock and %i space left",glockinv, suitcase);
                              getchar();
                              clrscr();
                              weaponsmark();
                             }
                             }
                            else
                            {
                            if (glockinv>1)
 
                            printf("\nHow many would you like to sell?");
                            scanf("%i,"&drugtemp);
                            cash=cash+(glockinv*50)
                            printf("\nYou sold %i's worth of Glocks");
                            glockinv=glockinv-drugtemp;
                            }
                            else
                            Printf("\nyou don't have any Glocks!")
                            weaponsmark();
                            }
                          }
 
 
           void suitcasefunc()
           {
           suitcase=200;
           }
           void cashfunc()
           {
            cash=50000
           }
 
 
 
 
 
 
 
void weaponsmark()
 
char weaponm;
 
do
{
 
     printf("\n\t\t a.Buy Glock 17 (Handgun)");
     printf("\n\t\t b.Buy M9 (Shotgun)");
     printf("\n\t\t c.Buy MP7 (Sub Machine Gun)");
     printf("\n\t\t d.Buy M4 (Rifle)");
     printf("\n\t\t e.Buy SV210 (Sniper Rifle)");
     printf("\n\t\t f.Buy Barret 50 .cal (Armor Piercing Rifle)");
     printf("\n\t\t g.Buy M203 (Grenade Launcher)");
     printf("\n\t\t h.Buy LAW 24 (Rocket Launcher)");
     printf("\n\t\t i.Buy Torque Bow (sticky bombs)");
     printf("\n\t\t j.Buy Nuke");
     printf("\n\t\t k.Buy Hammer Of Dawn (ION Cannon)");
     printf("\n\nWeapon Dealer: What kind of boom stick would you like
today, sir?");
     weaponm=getchar();
 
     switch(weaponm)
     {
 
     case 'a':glock17();
          break;
   /*  case 'b':m9();
          break;
     case 'c':mp7();
          break;
     case 'd':m4();
          break;
     case 'e':sv210();
          break;
     case 'f':barret();
          break;
     case 'g':m203();
          break;
     case 'h':law24();
          break;
     case 'i':torque();
          break;
     case 'j':nuke();
          break;
     case 'k':ION();
          break; */
     case 'l':break;
 
     default: printf("\n Invalid Menu Choice");
     getchar();
     }
}
while(weaponm!='l');
printf("\nGoodbye");
getchar();
}
 
 
/*void startmenu()
{
char choice;
 
do
{
    clrscr();
    printf("\n\t\t d.Drugs Market");
    printf("\n\t\t w.Weapons Market");
    printf("\n\t\t b.Buy Upgrade");
    printf("\n\t\t v.View Stats");
    printf("\n\t\t f.Fly");
    printf("\nEnter Choice");
    choice=getchar();
 
    switch(choice)
    {
 
    case 'a':printf("\n\nnumber1");
        getchar();
         break;
 
    case 'b':printf("\n\nnumber2");
         getchar();
         break;
 
    case 'c':break;
 
    default: printf("\n Invalid Menu Choice");
    getchar();
    }
}
while(choice!='c');
printf("\nGoodbye");
getchar();
}
 
 */
void main()
{
cashfunc();
suitcasefunc();
weaponsmark();
weaponm();
}
 
 
 

thanks in advance

[sicarie]

So that's just saying that you need to declare those functions you create. For instance, if I want to create a function that changes celsius to farenheit, it would look something like:

float celsiusToFarenheit(float faren) {
    float cel = (5/9) * (faren-32);
    return cel;
}
 

However, the compiler needs the prototype to be able to read it, so you would also need to include:

float celsiusToFarenheit(float faren);
 

Best practice dictates putting this by your headers (though I've never played around with the declarations - I'm not sure it's entirely necessary).

So, for C++:

include <iostream>
using namespace std;
float celsiusToFarenheit(float faren);
int main()
{
    float temp;
    cout << "Enter a temp: ";
    cin >> temp;
    cout << "The Celsius equivalent is: " << celsiusToFarenheit(temp) << endl;
    return 0;
}
 
float celsiusToFarenheit(float faren) {
    float cel = (5/9) * (faren-32);
    return cel;
}