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Help with While Loop and array

This is a discussion on Help with While Loop and array within the C Programming forums, part of the General Programming Boards category; I have to make a program for a voting machine for a presidential election as part of a school assignment. ...

  1. #1
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    Nov 2011
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    14

    Unhappy Help with While Loop and array

    I have to make a program for a voting machine for a presidential election as part of a school assignment. my question is that i'm using a while loop and numerous arrays. In the while loop , the data i type in gets overwritten every time the while loop executes in the loop. How to i switch the data location from for example i[0] to i[1] when the loop runs for the second time.

    If anyone could also tell me how to do proportional representation too, could you let me know.


    Thanks

  2. #2
    Registered User TheBigH's Avatar
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    May 2010
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    Melbourne, Australia
    Posts
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    We have no way of knowing what's going wrong in your code unless you show us your code.
    Code:
    while(!asleep) {
       sheep++;
    }

  3. #3
    Registered User
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    Nov 2011
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    Code:
    while(i!=5)
        {
           
               
               
                    printf("2011 Presidential Election \n");
                
                    system("pause");
                   
                    printf("\nPlease Enter a vote for candidate1 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&mg[0]);
                    
                    printf("Please Enter a vote for candidate2 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&da[0]);
                    
                    printf("Please Enter a vote for candidate3 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&no[0]);
                    
                    printf("Please Enter a vote for candidate4 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&gal[0]);
                    
                    printf("Please Enter a vote for candidate5 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&hig[0]);
                    
                    printf("Please Enter a vote for candidate6 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&dav[0]);
                    
                    printf("Please Enter a vote for candidate7 \n");
                    printf("Enter 1 for first choice \n");
                    printf("Enter 2 for 2nd choice \n");
                    printf("Enter 3 for 3rd choice \n");
                    printf("Enter 0 for no vote \n");
                            
                    scanf("%d",&mit[0]);
                    
                    
                    
                    printf("\n Thank you for voting!! \n");
                    
                   
                    
                    system("pause");
                  
                    (i++);
                    mg[0]+= 1;
                    
                   system("cls");    
                  
                  
                  
                   
        }    
            printf("%d,%d,%d,%d", mg[0]);
    ok here's the part I am talking about, what do i do to get mg[0] to change to mg[1] on the loop and so on to mg[2] and mg[3]

  4. #4
    spurious conceit MK27's Avatar
    Join Date
    Jul 2008
    Location
    segmentation fault
    Posts
    8,300
    Use a variable instead of hardcoding the array index:

    Code:
    	int ray[5] = { 4, 3, 2, 1, 0 };
    	int i = 0;
    	while (ray[i]) {
    		printf("%d\n", ray[i]);
    		i++;
    	}
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  5. #5
    Registered User
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    Thanks MK27, much appreciated. got it working
    MK27 likes this.

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