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PORemove an element from a vector in C
 

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  1. PORemove an element from a vector in C
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    <p>How can I remove an element from a vector in C without changing my print_vector function?</p> <p>1) Here's the code that I made for removing an element on a position given from the keybord:</p> <pre><code>void remove_a_cost(int a) { int nr, c; printf("Give the number of cost for remove: "); scanf("%d", &amp;nr); if(nr&gt;a) { printf("The remove is impossible!\n"); } else { for(c=nr;c&lt;=a;c++) { chelt[c]=chelt[c+1]; } } } </code></pre> <p>2)This is the print function</p> <pre><code>void print_costs(int a) { int i; if(a&gt;0 &amp;&amp; a&lt;=n) { for(i=1;i&lt;=a;i++) { printf("\nCost %d\n\n",i); printf("Day: %s\n", chelt[i].day); printf("Sum: %d\n", chelt[i].sum); printf("Type: %s\n", chelt[i].type); } } } </code></pre> <p>3) Here's the add_new_cost() function</p> <pre><code>int add_new_cost() { int a,i; printf("Nr of costs = "); scanf("%d", &amp;a); if(a&gt;0 &amp;&amp; a&lt;=n) { for(i=1;i&lt;=a;i++) { printf("\nType the attributes for cost %d",i); printf("\nDay = "); scanf("%s",chelt[i].day); printf("Sum = "); scanf("%d", &amp;chelt[i].sum); printf("Type = "); scanf("%s",chelt[i].type); } } return a; } </code></pre> <p>4) This is the main function</p> <pre><code>int main() { setbuf(stdout,NULL); int b,choice; do { printf("\nMenu\n\n"); printf("1 - Add a cost\n"); printf("2 - Print a cost\n"); printf("3 - Update a cost\n"); printf("4 - Delete a cost\n"); printf("5 - Exit\n\n"); printf("Command = "); scanf("%d",&amp;choice); switch (choice) { case 1: b=add_new_cost(); break; case 2: print_costs(b); break; case 3: update_cost(b); break; case 4: remove_a_cost(b); break; case 0: printf("Goodbye\n"); break; default: printf("Wrong Choice. Enter again\n"); break; } } while (choice != 0); return 0; } </code></pre> <p>Example: If I have 4 elements on the vector:</p> <pre><code>1)Type the attributes for cost Day = luni Sum = 2 Type = dsasa Type the attributes for cost 2 Day = marti Sum = 23 Type = adsds Type the attributes for cost 3 Day = miercuri Sum = 23 Type = asd Type the attributes for cost 4 Day = joi Sum = 232 Type = asdas </code></pre> <p>and I try to delete, let's say the 3rd element, this is what I receive when I print:</p> <pre><code>Cost 1 Day: luni Sum: 20 Type: maradf Cost 2 Day: marti Sum: 23 Type: afas Cost 3 Day: joi Sum: 45 Type: sdfadsf Cost 4 Day: Sum: 0 Type: </code></pre> <p>The element(COST 4) appears when it should've been deleted. Is there a solution for deleting the element WITHOUT changing the print function?</p>
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    1. COJust make your first function return the number of elements that remain in your 'vector'. You can use this value to update the value of the **int a** that is passed to your **print_costs** function.
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