Data loss problems with type conversion in C language

When a longer integer is converted to a shorter integer or char type, the excess high portion is discarded.

Program One:

#include <stdio.h>     
int main ()     
{     
    int i;     
    char c;     

    i=65535;     
    c=48;     

    I=c;
    c=i;

    printf ("char=%c\n", c);     
    printf ("int=%d", I);     
    GetChar ();     
}

The output is:

Program Two:

#include <stdio.h>     
int main ()     
{     
    int i;     
    char c;     

    i=65535;     
    c=48;     

    c=i;     
    I=c;     
    printf ("char=%c\n", c);     
    printf ("int=%d", I);     
    GetChar ();     
}

The output is:

Characters are not visible because of c=-1

When a lower type of data is converted to a higher type, it is generally only a form change without affecting the substance of the data, and some data may be lost when the higher type of data is converted to a lower type.

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