Principles of Computer Programming - Revision history

Dvernon at 07:28, 5 February 2024

2024-02-05T07:28:32Z

2024-02-05T07:02:24Z

2020-01-17T06:53:51Z

2020-01-17T06:45:47Z

2020-01-17T06:43:20Z

2020-01-15T09:48:21Z

2020-01-15T09:47:58Z

2020-01-15T09:47:30Z

2020-01-15T09:46:50Z

2020-01-14T16:23:41Z

@@ Line 7: / Line 7: @@
   #include <stdio.h>
-  void main() {
+  int main() {
      char letter;
@@ Line 33: / Line 33: @@
   #include <stdio.h>
-  void main() {
+  int main() {
      int first_number, second_number;
@@ Line 56: / Line 56: @@
   #include <stdio.h>
-  void main() {
+  int main() {
      int first_number, second_number, third_number;
@@ Line 97: / Line 97: @@
   #define FALSE 0
-  void main() {
+  int main() {
      char letter, enter;
@@ Line 225: / Line 225: @@
   #define FALSE 0
-  void main() {
+  int main() {
      char letter, enter;
@@ Line 345: / Line 345: @@
   #define FALSE 0
-  void main() {
+  int main() {
      int n1, n2, n3;
@@ Line 419: / Line 419: @@
-  void main()
+  int main()
+  {
      FILE *fp_in, *fp_out;
@@ Line 473: / Line 473: @@
+  }
-  void main()
+  int main()
+  {
      FILE *fp_in, *fp_out;
@@ Line 528: / Line 528: @@
   #define MAX 100
-  void main()
+  int main()
+  {
      FILE *fp_in, *fp_out;
@@ Line 608: / Line 608: @@
   #include <stdio.h>
-  main() {
+  int main() {
      /*** define structure types ***/
@@ Line 689: / Line 689: @@
   #include <stdio.h>
-  main() {
+  int main() {
      /*** define structure types ***/

← Older revision		Revision as of 07:02, 5 February 2024
Line 1:		Line 1:
−	Here are some code segments for the examples in the course on [http://vernon.eu/~~courses~~.htm#pcp principles of computer programming].	+	Here are some code segments for the examples in the course on [http://vernon.eu/teaching.htm#pcp principles of computer programming].

	/* Example 1 */		/* Example 1 */

← Older revision		Revision as of 06:53, 17 January 2020
Line 376:		Line 376:
	if ((n1 != n2) && (n2 != n3) && (n1 != n3)) {		if ((n1 != n2) && (n2 != n3) && (n1 != n3)) {
	printf("The three numbers are all the different.\n");		printf("The three numbers are all the different.\n");
−	}	+	}
−	else {	+	else {

	/* two are the same - which are they? */		/* two are the same - which are they? */

	if (n1 == n2) {		if (n1 == n2) {
−	printf("The first and second numbers are the same: %d %\n”, n1, n2);	+	printf("The first and second numbers are the same: %d %\n”, n1, n2);
−	}	+	}
−	else {	+	else {
−	if (n2 == n3) {	+	if (n2 == n3) {
−	printf("The second and third numbers are the same: %d %d\n", n2, n3);	+	printf("The second and third numbers are the same: %d %d\n", n2, n3);
		+	}
		+	else {
		+	/* no need to check if the first and third */
		+	/* are the same ... it's the only possibility */
		+	printf("The first and third numbers are the same:%d %d\n", n1, n2);
	}		}
−	~~else {~~	+	}
−	~~/* no need to check if the first and third */~~	+	}
−	~~/* are the same ... it's the only possibility */~~	+	}
−	~~printf("The first and third numbers are the same:%d %d\n", n1, n2);~~	+	}
−	}	+
−	}	+
−	}	+
−	}	+
−	}	+
	}		}

← Older revision		Revision as of 06:45, 17 January 2020
Line 375:		Line 375:
	else {		else {
	if ((n1 != n2) && (n2 != n3) && (n1 != n3)) {		if ((n1 != n2) && (n2 != n3) && (n1 != n3)) {
−	printf("The three numbers are all the different.\n");	+	printf("The three numbers are all the different.\n");
−	}	+	}
	else {		else {

Line 382:		Line 382:

	if (n1 == n2) {		if (n1 == n2) {
−	printf("The first and second numbers are the same: %d %\n”, n1, n2);	+	printf("The first and second numbers are the same: %d %\n”, n1, n2);
−	}	+	}
−	else {	+	else {
−	if (n2 == n3) {	+	if (n2 == n3) {
−	printf("The second and third numbers are the same: %d %d\n", n2, n3);	+	printf("The second and third numbers are the same: %d %d\n", n2, n3);
−	}	+	}
−	else {	+	else {
−	/* no need to check if the first and third */	+	/* no need to check if the first and third */
−	/* are the same ... it's the only possibility */	+	/* are the same ... it's the only possibility */
−	printf("The first and third numbers are the same:%d %d\n", n1, n2);	+	printf("The first and third numbers are the same:%d %d\n", n1, n2);
−	}	+
	}		}
	}		}
−	}	+	}
−	}	+	}
		+	}
	}		}

@@ Line 382: / Line 382: @@
               if (n1 == n2) {
-  	            printf("The first and second numbers are the same: %d\n”,
+  	            printf("The first and second numbers are the same: %d %\n”, n1, n2);
-                n1, n2);
+  	         }
   	         else {
   	            if (n2 == n3) {
-  	               printf("The second and third numbers are the same: %d\n",
+  	               printf("The second and third numbers are the same: %d %d\n", n2, n3);
-                   n2, n3);
+  	            }
   	            else {
-  	            else {  /* no need to check if the first and third    */
+                       /* no need to check if the first and third    */
- 		               /* are the same ... it's the only possibility */
+ 		        /* are the same ... it's the only possibility */
-         	    printf("The first and third numbers are the same:%d\n",
+         	        printf("The first and third numbers are the same:%d %d\n", n1, n2);
-                    n1, n2);
+  	            }
+  	         }

@@ Line 49: / Line 49: @@
+  }
-  /* Example 2b                                     */
+  /* Example 2b                                    */
   /* This is a C program to ask you to enter three */
   /* numbers; it then compares them and prints a   */

@@ Line 15: / Line 15: @@
+  }
-If you compile and run this on Microsoft Visual C++, you won't see anything because the window in which the program executes disappears as soon as the program exits.  One solution is to wait until the user presses a key to exit.  You can use the following code to do this. This won't be necessary if you are running the program from the terminal in Linux, for example.
+If you compile and run this on Microsoft Visual C++, you won't see anything because the window in which the program executes disappears as soon as the program exits.  One solution is to wait until the user presses a key to exit.  You can use the following code to do this. This won't be necessary if you are running the program from the terminal in Linux having compiled it with gcc, for example.
   #include <conio.h>