#includemain(){printf("**********************\n");printf("** Menu Principal **\n");printf("**Suma_ _ _ _ _ [1]**\n");printf("**Resta _ _ _ _ [2]**\n");printf("**Multiplicacion [3]**\n");printf("**Sallir _ _ _ _ [0]**\n");printf("**********************\n");
int numero,total,Num1,Num2;printf("Introduzca opcion:");scanf("%d",&numero);switch(numero){case 1:printf("Introduzca Num1:");scanf("%d",&Num1);printf("Introduzca Num2:");scanf("%d",&Num2);total=Num1 + Num2;printf("la suma es: %d",total);break;case 2:printf("Introduzca Num1:");scanf("%d",&Num1);printf("Introduzca Num2:");scanf("%d",&Num2);total=Num1 - Num2;printf("la resta es: %d",total);break;case 3:printf("Introduzca Num1:");scanf("%d",&Num1);printf("Introduzca Num2:");scanf("%d",&Num2);total=Num1 * Num2;printf("la multiplicacion es: %d",total);break;default: puts("salir");}return 0;}