12節の問題

1  プログラム

     #include
     main(){int a,b,c;
            printf("整数を入力\na=");
            scanf("%d",%a);
            printf("\nb=");
            scanf("%d",&b);
            printf("\nc=");
            scanf("%d",&c);
            printf("a+b+c=%d  ",a+b+c);}

2  プログラム

    #include
     main(){int a,b,c;
            FILE *fount
            fount=fopen("output1.txt","w");
            printf("整数を入力\na=");
            fprintf(fp,"整数を入力\na=");
            scanf("%d",&a);
            printf("\nb=");
            fprintf(fp,"\nb=");
            scanf("%d",&b);
            printf("\nc=");
            fprintf("\nc=");
            scanf("%d",&c);
            printf("a+b+c=%d  ",a+b+c);
            fprintf(fp,"a+b+c=%d  ",a+b+c);
            fclose(fp);}

3  プログラム
     #include
     main(){ int a,b,c;
           FILE *fp1,*fp2;
           fp1=fopen("input2.txt","r");
           fp2=fopen("output2.txt","w");
           fscanf(fp1,"%d%d%d",&a,&b,&c);
           fprintf(fp2,"%d",a+b+c);
           fclose(fp1);
           fclose(fp2);}