Question

When I run this code use ./main How to fix it when program reminds segmentation fault (core dumped)？

#include <iostream>

void set_num(int* i_prt, int num) {

*i_prt = num;

}

int main(int argc, char** argv) {

int x;

set_num(&x, 13);

std::cout << "x: " << x << std::endl;

int* y;

set_num(y, 4);

std::cout << "*y:" << *y << std::endl;

}

Answer 1

Segmentation fault (core dumped) is occuring because you are accessing memory that can't be accessed. This can be fixed by declaring y as x.try running this code this will give correct output.

#include<iostream>
void set_num(int *iptr, int num)
{
*iptr=num;
}
int main(int argc,char** argv)
{
int x;
set_num(&x, 13);
std::cout<<"x: "<<x<<std::endl;
int y;
set_num(&y,4);
std::cout<<"y: "<<y<<std::endl;
}