int main()
{
    uint32_t var = 0x12345678;
    uint32_t rev = 0;
    int count++;
    

    //rev = (var & 0xF) >> 32;
    //rev = (var & 0x0F) >> 28; //0x00F
    
    for(int i=8;i>=0;i++){
        count++;
        rev = (var & 0xcount+) >> 4*i;
    }
}


#include <stdio.h>
#include <string.h>

int main()
{
    char ip[15] = "SaMsuNG Exynos";
    int len = strlen(ip);
    
    for(int i=0;i<len;i++){
        if(ip[i]>=65 && ip[i]<=90){ 65=97
            ip[i] 
        }
    }
}



#include <stdio.h>

int main()
{
    char str[4] = "SAM";
    char val[25] = "SAMhelloSAMyelloSAM12345SAM54321helloSAMyelloMAShello";
    int len = strlen(val);
    int index = strstr(val,str);
    strcat(val,len-index-3);
    
    
}