C pointer question, dereferencing crash
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by skynorth
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Published on 2010-05-23T22:05:19Z
Indexed on
2010/05/23
22:10 UTC
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Hit count: 171
Why do this work?
int *var;
while(scanf("%d", &var) && *var != 0)
printf("%d \n", var);
While this does not?
int *var;
while(scanf("%d", &var) && var != 0)
printf("%d \n", var);
Doesn't * (dereference operator) give you the value pointed by the pointer? So why does *var != 0 crash the program, while var != 0 does not?
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