简单的测试文件

  1 #include <stdio.h>
  2 
  3 float getData(){
  4     float *ptr = (float *)malloc(sizeof(float));
  5     *ptr = 22.100;
  6 
  7     return *ptr;
  8 }
  9 
 10 void outData(float data){
 11     printf("%f\n", data);
 12 
 13     return;
 14 }
 15 
 16 int main(int argc, char **argv)
 17 {
 18     /*for(int i = 0; i < argc; i++){
 19         printf("%s\n", *(argv + i));
 20     }*/
 21     float varF1 = 3.14f;
 22     unsigned int *ptr = &varF1;
 23     float *ptrF = ptr;
 24     printf("%d\t %f\n", *ptr, varF1);
 25     printf("%f\t %f\n", *ptrF, varF1);
 26 
 27     float data = getData();
 28     outData(data);
 29 
 30     int var = 0x1072;
 31     char ch = (char)(var);
 32     printf("%x and %x\n", var, ch);                                                                                         
 33 
 34 
 35     return 0;
 36 }