In C, Prompt User And Draw Box By Given Characters, Height And Width

#include<stdio.h>
void main(){
    int i, j, wd, hg;
    char hc, vc, ch;
    do{
        fflush(stdin);
        printf("Enter horizontal & vertical character: ");
        scanf("%c %c", &hc, &vc);
        fflush(stdin);
        printf("Enter height & width: ");
        scanf("%d %d", &hg, &wd);
        printf("Using brutal force: \n");
        for(i=wd;i;i--) printf("%c", hc);
        printf("\n");
        for(i=hg-2;i;i--){
            printf("%c",vc);
            for(j=wd-2;j;j--) printf(" ");
            printf("%c\n", vc);
        }
        for(i=wd;i;i--) printf("%c", hc);
        printf("\n");
        fflush(stdin);
        printf("\nContinue [y/n]: ");
        scanf("%c", &ch);
    }while('y' == ch || 'Y' == ch);
}

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