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G++ missing warning
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a, b;
float f, g = 1;
if(rand() < 0.5) {
b = 0;
} else {
b = 5;
}
for(a = 0; a < b; ++a) {
/* you would expect the following line to trigger a warning "f is used uninitialized"...
but that doesn't happen without optimization (-O)! */
f = f + a;
}
g += f;
printf("%f\n", g);
return 0;
}
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