If else not read third condition in C-CodePudding

I have a task named ''Discounted Coffee Machine'' with these conditions:

if(p<a){
        printf("\nYour balance is not enough.");
        printf("\nRemaining balance: %d",p);
        }
else if(p>=a && dis!=dis2){
        printf("\nEnjoy your Latte. ");
        printf("\nRemaining balance: %d",p-a);
        }
        
else if(p>=a && dis==dis2){
        printf("\nThe discount has been applied.\nEnjoy your Latte.");
        printf("\nRemaining balance: %f",(float)p-(float)a*0.9);
        }

But, if I enter the correct discount code, it doesn't read the second else if. It only reads the first else if. How can I solve this?

I tried with the second else if like only else, but it's not working. I also tried with ',' and '||'.

CodePudding user response：

dis and dis2 are character arrays

 char dis[]="ostim"; 
 char dis2[5];

dis!=dis2 compares the addresses of those 2 different arrays and so dis!=dis2 is always true. Code needs to compare the strings at those addresses. @Chris Dodd
Use strcmp() which returns 0 when the strings are the same.

Replace dis!=dis2 with strcmp(dis, dis2) != 0 or simply

// else if(p>=a && dis!=dis2){
else if(p>=a && strcmp(dis, dis2)) {

Likewise for else if(p>=a && dis==dis2).