Thread: Segmentation fault (core dumped)

I am new to programming and am following c programming for the absolute beginner. On two different programs I get this message when I run the program. Segmentation fault. What is Segmentation fault? What causes it? How do i fix it in the program listed. Thanks for the help.

Code:

#include <stdio.h>
main()
{

int x, iNumQuestions, iResponse, iRndNum1, iRndNum2;

srand(time());
printf("\nEnter number of questions to ask: ");

scanf("%d", &iNumQuestions);
for ( x = 0; x < iNumQuestions; x++ ) {

iRndNum1 = rand() % 10 + 1;
iRndNum2 = rand() % 10 + 1;

printf("\nWhat is %d x %d: ", iRndNum1, iRndNum2);
scanf("%d", &iResponse);

if ( iResponse == iRndNum1 * iRndNum2 ) 
printf("\nCorrect!\n");

else
printf("\nThe correct answer was %d \n", iRndNum1 * iRndNum2);

} //end for loop

What is Segmentation fault? What causes it? How do i fix it in the program listed.

A segmentation fault is usually caused by a program trying to access memory that does not belong to the program.

Your problem may be caused by these error messages that I received when I compiled your program. It looks like you are missing a few include files. And the function main() should be defined as returning an int, and you should return an int from this function.

main.c|2|error: return type defaults to ‘int’|
main.c||In function ‘main’:|
main.c|7|error: implicit declaration of function ‘srand’|
main.c|7|error: implicit declaration of function ‘time’|
main.c|13|error: implicit declaration of function ‘rand’|
||=== Build finished: 4 errors, 0 warnings ===|

Jim

look up the definition of the 'time' function