program goes in infinite loop??

Question

Aamit -7 Posting Whiz

15 Years Ago

Day:
                                printf("\n1:Mon\t2:Tue\t3:Wed\t4:Thu\n5:Fri\t6:Sat\t7:Sun\nEnter value-> ");
                                scanf("%d",&x);
                                char dd1[5]="MON"; char dd2[5]="TUE"; char dd3[5]="WED";
                                char dd4[5]="THU"; char dd5[5]="FRI"; char dd6[5]="SAT";
                                char dd7[5]="SUN";
                                if(x==1){  strcpy(dd,dd1);   } 
                                if(x==2){  strcpy(dd,dd2);   }    
                                if(x==3){  strcpy(dd,dd3);   } 
                                if(x==4){  strcpy(dd,dd4);   } 
                                if(x==5){  strcpy(dd,dd5);   } 
                                if(x==6){  strcpy(dd,dd6);   }
                                if(x==7){  strcpy(dd,dd7);   } //printf("%s",dd);
                                if(x>7 || x<1)
                                {
                                       cout<<"\nPlease Enter Valid Option\n";
                                       goto Day ;
                                }

this is part of my code.....
If i given input any character it goes infinite loop...
E.g:- q
if gives int value it works fine
how to resolve it??

c++

2 Contributors
1 Reply
142 Views
6 Hours Discussion Span
Latest Post 15 Years Ago Latest Post by mitrmkar

Reply to this topic

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.

mitrmkar 1,056 Posting Virtuoso · Answer 1 · 2008-06-26T15:45:20+00:00

Day:
                                printf("\n1:Mon\t2:Tue\t3:Wed\t4:Thu\n5:Fri\t6:Sat\t7:Sun\nEnter value-> ");
                                scanf("%d",&x);
                                char dd1[5]="MON"; char dd2[5]="TUE"; char dd3[5]="WED";
                                char dd4[5]="THU"; char dd5[5]="FRI"; char dd6[5]="SAT";
                                char dd7[5]="SUN";
                                if(x==1){  strcpy(dd,dd1);   } 
                                if(x==2){  strcpy(dd,dd2);   }    
                                if(x==3){  strcpy(dd,dd3);   } 
                                if(x==4){  strcpy(dd,dd4);   } 
                                if(x==5){  strcpy(dd,dd5);   } 
                                if(x==6){  strcpy(dd,dd6);   }
                                if(x==7){  strcpy(dd,dd7);   } //printf("%s",dd);
                                if(x>7 || x<1)
                                {
                                       cout<<"\nPlease Enter Valid Option\n";
                                       goto Day ;
                                }

this is part of my code.....
If i given input any character it goes infinite loop...
E.g:- q
if gives int value it works fine
how to resolve it??

You need to check the return value of scanf() which tells you whether it succeeded or not (in getting an int from the user).

scanf()