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#include <stdio.h>
unsigned int reverse_bits(unsigned int value)
{
    unsigned int answer;
    unsigned int i;
    answer = 0;
   
    for(i=1;i!=0;i<<=1){ //´ËÑ­»·¿ÉÒÔºöÂÔ»úÆ÷µÄ²îÒì¡£64λºÍ32λ½Ô¿ÉÓã¬Ôö ......

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g++ -Wall hellocpp.cpp
gcc -Wall hellocpp.cpp -lstdc++
gfortran -Wall hellocpp.cpp -lstdc++
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C unsigned int and int

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unsigned int a=20;
signed int b=-130;
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char cmd[128];
...
int  status = system(cmd);
printf("%d == system(\"%s\");\n", WEXITSTATUS(status), cmd);  //´òÓ¡·µ»ØÖµ
 
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