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BMuscle/point6.cpp

Created October 13, 2019 03:19
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point6.cpp
#include <stdio.h>
#include <stdlib.h>
int *func1() {//このような書き方はしてはならない。 aが保証されないため
int a = 10;
return &a;
}
int *func2() {//これはmallocで確保しているので自動変数の領域には入らない
int *a = (int*)malloc(sizeof(int) * 10);
a[0] = 100;
a[1] = 200;
a[2] = 300;
return a;
}
void func3() {//自動変数を上書きする
int a = 10000;
int b = 10000;
int c = 10000;
}
int main()
{
int* a;
a = func2();
func3();
printf("a[0]=%d, a[1]=%d, a[2]=%d\n", a[0], a[1], a[2]);
return 0;
}
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