C语言简明讲解三目运算符和逗号表达式的使用

#include <stdio.h>
 
int main()
{
    int a = 1;
    int b = 2;
    int c = 0;
    
    c = a < b ? a : b;
    
    (a < b ? a : b) = 3;
    
    printf("%d\n", a);
    printf("%d\n", b);
    printf("%d\n", c);
    
    return 0;
}

#include <stdio.h>
 
int main()
{
    int a = 1;
    int b = 2;
    int c = 0;
    
    c = a < b ? a : b;
    
    *(a < b ? &a : &b) = 3;
    
    printf("%d\n", a);
    printf("%d\n", b);
    printf("%d\n", c);
    
    return 0;
}

#include <stdio.h>
 
int main()
{   
    char c = 0;
    short s = 0;
    int i = 0;
    double d = 0;
    char* p = "str";
        
    printf( "%d\n", sizeof(c ? c : s) );
    printf( "%d\n", sizeof(i ? i : d) );
    //printf( "%d\n", sizeof(d ? d : p) );
    return 0;
}

#include <stdio.h>
 
void hello()
{
    printf("Hello!\n");
}
 
int main()
{   
    int a[3][3] = {
        (0, 1, 2),
        (3, 4, 5),
        (6, 7, 8)
    };
    
    int i = 0;
    int j = 0;
    
    while( i < 5 )
        printf("i = %d\n", i),
        
    hello(),
    
    i++;
        
    for(i=0; i<3; i++)
    {
        for(j=0; j<3; j++)
        {
            printf("a[%d][%d] = %d\n", i, j, a[i][j]);
        }
    }
 
    return 0;
}

#include <stdio.h>
#include <assert.h>
 
int strlen(const char* s)
{  
    return assert(s), (*s ? strlen(s + 1) + 1 : 0);
}
 
int main()
{   
    printf("len = %d\n", strlen("Autumn"));
    printf("len = %d\n", strlen(NULL));
    
    return 0;
}