การสื่อสารข้อมูล และระบบเครือข่าย

#include <stdio.h> void main() { int num; printf("Enter score : "); scanf("%d", &num); switch (num / 10) { case 10: case 9: case 8: printf("Grade A\n"); break; case 7: printf("Grade B\n"); break; case 6: printf("Grade C\n"); break; case 5: printf("Grade D\n"); break; default: printf("Grade F\n"); break; } }

#include <stdio.h> float pi = 3.14; float AreaCircle(float r) { return pi * r * r; } void main() { float r; float ans; printf("Enter radius : "); scanf("%f", &r); ans = AreaCircle(r); printf("Area = %f\n", ans); }

#include <stdio.h> float AreaTriangle(float h, float b) { return (h * b) / 2; } void main() { float h; float b; float ans; printf("Enter height : "); scanf("%f", &h); printf("Enter base : "); scanf("%f", &b); ans = AreaTriangle(h, b); printf("Area = %f\n", ans); }

#include <stdio.h>     int main() {          int i, j, n;          for (i=1; i<=12; i++){          n = 2;          for (j=1; j<=6; j++){              printf ( "%5dx%2d=%3d" , n, i, n*i);              n++;          }          printf ( "\n" );      }          printf ( "\n\n" );          for (i=1; i<=12; i++){          n = 8;          for (j=1; j<=6; j++){              p...

# include <stdio.h> # include <conio.h> int main() { int side1,side2,high; float area; printf("\nEnter Side 1 :"); scanf("%d",&side1); printf("\nEnter Side 2 :"); scanf("%d",&side2); printf("\nEnter High :"); scanf("%d",&high); area =(side1+side2)*high/2; printf("%f",area); getch(); }

#include  <stdio.h> #include  <conio.h> int main( ) { int score; printf("Input score="); scanf("%d",&score); { if(score>=90) printf("grade A score 4",score); else if(score>=86) printf("grade B+ score 3.5",score); else if(score>=81) printf("grade B score 3",score); else if(score>=76) printf("grade C+ score 2.5",score); else if(score>=61) printf("grade C score 2",score); else if(score>=56) printf("grade D+ score 1.5",score); else if(score>=50) printf("grade D score 1",score); else if(score>=0) printf("grade E score 0",score); } getch(); }

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