switch.c

#include<stdio.h>
int main()
{
    int ans=0;

    do{
        printf("1-play game\n");
        printf("2-save game\n");
        printf("3-exit game\n");
        printf("please choose 1,2,3: ");
        scanf("%d",&ans);

        switch(ans){
            case 1: printf("playing game!...\n\n"); break;
            case 2: printf("saving game!...\n\n");break;
            case 3: return 0;
            default: printf("wrong input, please enter 1, 2, 3 only!!!\n\n\n"); break;
        }

    }while(1);
    return 0;
}