(data type) variable_name
![\begin{tikzpicture}[node distance=1cm,auto]\setlength \baselineskip{1ex}
\node [] (ld) {long double};
\node [below of=ld] (double) {double};
\node [below of=double] (float) {float};
\node [below of=float] (unll) {unsigned long long};
\node [below of=unll] (ll) {long long};
\node [below of=ll] (unl) {unsigned long};
\node [below of=unl] (long) {long};
\node [below of=long] (unint) {unsigned int};
\node [below of=unint] (int) {int};
\path [line] (int) --(unint);
\path [line] (unint) -- (long);
\path [line] (long) -- (unl);
\path [line] (unl) -- (ll);
\path [line] (ll) -- (unll);
\path [line] (unll) -- (float);
\path [line] (float) -- (double);
\path [line] (double) -- (ld);
\end{tikzpicture}](img7.png)
[dywang@dyw219 zzz]$ vim typetran1.c
[dywang@dyw219 zzz]$ cat typetran1.c
#include <stdio.h>
main() {
int n1, n2;
float f1=3.14159, f2=5.987;
n1 = (int) f1;
n2 = (int) f2;
printf("f1 = %f, n1 = %d\n", f1, n1);
printf("f2 = %f, n2 = %d\n", f2, n2);
}
[dywang@dyw219 zzz]$ gcc -o typetran1 typetran1.c
[dywang@dyw219 zzz]$ ./typetran1 f1 = 3.141590, n1 = 3 f2 = 5.987000, n2 = 5