what is the usage of extern in c
#include <stdio.h>
extern int x = 32;
int b = 8;
int main() {
auto int a = 28;
extern int b;
printf("The value of auto variable : %d\n", a);
printf("The value of extern variables x and b : %d,%d\n",x,b);
x = 15;
printf("The value of modified extern variable x : %d\n",x);
return 0;
}when to use extern "C"
extern "C"{
int printf(const char *format,...);
}
main() {
printf("Hello World");
}Copyright © 2021 Codeinu
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