#include <stdio.h>
#include <string.h>
float get_cpu_clock_speed()
{
FILE *fp;
char buffer[1024];
size_t bytes_read;
char *match;
float clock_speed;
fp=fopen("/proc/cpuinfo","r");
bytes_read=fread(buffer,1,sizeof(buffer),fp);
if(bytes_read==0 || bytes_read==sizeof(buffer))
return 0;
buffer[bytes_read]='\0';
match=strstr(buffer,"cpu MHz");
if(match == NULL)
return 0;
sscanf(match,"cpu MHz :%f",&clock_speed);
#if 0
printf("buffer:%s, match:%s\n",buffer,match);#endif
return clock_speed;
}
int main()
{
printf("CPU clock speed:%4.0f MHz\n",get_cpu_clock_speed());
return 0;
}