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int main()
{
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printf(p, 10, 34, p, 34);
} ......
In C programming language, the observer design pattern is implemented with function pointer (aka callback function). But in Qt library, it introduces signal and slot. How to link a callback function from the C callback function to the C++ siganl and slot is a problem I encounter. Call back function ......
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#include<stdio.h>
int main ( int argc, char *argv[] )
{
printf("hello world!!\n");
return 0;
}
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