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??

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()

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