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  1. #include <stdio.h>
  2. #include <inttypes.h>
  3. #define SWAP(a,b) do ((&(a))!=(&(b)))?((a)^=(b)^=(a)^=(b)):((a)=(a)); while (0)
  4. char   *p1="1" ,*p2="2" ;
  5. char    c1=1   , c2=2   ;
  6. short   s1=1   , s2=2   ;
  7. int     i1=1   , i2=2   ;
  8. int64_t I1=1ll, I2=2ll;
  9. float   f1=1.0f, f2=2.0f;
  10. double  d1=1.0 , d2=2.0 ;
  11. int main() {
  12.     SWAP(*(int*)&p1,*(int*)&p2);                printf("char *     %5s,   %5s\n",p1,p2);
  13.     SWAP(c1,c2);                          printf("char       %5d,   %5d\n",c1,c2);
  14.     SWAP(s1,s2);                          printf("short      %5d,   %5d\n",s1,s2);
  15.     SWAP(i1,i2);                          printf("int        %5d,   %5d\n",i1,i2);
  16.     SWAP(I1,I2);                          printf("__int64 %5lld,%5lld\n",I1,I2);
  17.     SWAP(*(int     *)&f1,*(int     *)&f2);printf("float      %5g,   %5g\n",f1,f2);
  18.     SWAP(*(int64_t *)&d1,*(int64_t *)&d2);printf("double    %5lg,  %5lg\n",d1,d2);
  19.  
  20.     SWAP(c1,c1);
  21.     printf("%d\n",c1);
  22. }
Success #stdin #stdout 0.02s 2724KB
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stdin
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Standard input is empty
stdout
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char *         2,       1
char           2,       1
short          2,       1
int            2,       1
__int64     2,    1
float          2,       2
double        2,      2
2
https://ideone.com/7WkOI
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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