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#include <stdio.h> static int internalVar = 20; void printInternalVar() { printf("internalVar: %d\n", internalVar); } void modifyInternalVar(int value) { internalVar = value; } int main() { printf("main_internalVar: %d\n", internalVar); internalVar = 300; printf("main_internalVar: %d\n", internalVar); return 0; }
#include <stdio.h> extern void printInternalVar(); extern void modifyInternalVar(int value); int main() { printInternalVar(); modifyInternalVar(50); printInternalVar(); return 0; }

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