Introduction to C language Programming--switch, break and continue

Switch, break, and continue keywords are often used in process control, and the use of these three keywords is listed here.

Break Example 1:

# include <stdio.h>int main (void) {int i;for (i=0;i<3;++i) {if (3>2) break;  The break here is used to terminate the FOR Loop statement, not the IF statement. The following printf statement is no longer executed and the output is empty. printf ("Haha! \ n ");} return 0;}

Break Example 2:

# include <stdio.h>int main (void) {int I, j;for (i=0; i<3; ++i) {for (j=1; j<4; ++j) break;//output is three "Oh! ", break can only terminate a loop closest to it. printf ("Hehe! \ n ");} return 0;}

Switch Example:

# include <stdio.h>int main (void) {int i;printf ("Please enter the number of floors you want:"), scanf ("%d", &i), switch (i) {case 1:printf (" The elevator will open on the 1 floor! \ n "); Break;case 2:printf (" The elevator will open on the 2 floor! ") \ n "); Break;case 3:printf (" The elevator will open on the 3 floor! ") \ n "); Break;case 4:printf (" The elevator will open on the 4 floor! ") \ n "); Break;case 5:printf (" The elevator will open on the 5 floor! ") \ n "); Break;case 6:printf (" The elevator will open on the 6 floor! ") \ n "); Break;case 7:printf (" The elevator will open on the 7 floor! ") \ n "); Break;case 8:printf (" The elevator will open on the 8 floor! ") \ n "); break;default:printf (" Sorry, I haven't covered this floor! ") \ n ");} /* Character connection: printf ("Elevator will be in");p rintf ("%d", i);p rintf ("Layer open! \ n "); */return 0;}

Continue example:

# include <stdio.h>int main (void) {int I, j;for (i=0; i<3; i++) {A; B;continue; Continue will c;d the remainder of the loop; skip to execute i++. C;d;} j = 0while (j<3) {A; b;j++;  Updating some J + + will not be skipped, otherwise it becomes a dead loop. Continue Continue will c;d the remainder of the loop; skip to execute i++. C;d;} return 0;}

Switch and break examples:

# include <stdio.h>int main (void) {int x = 1;int y = 0;int A = 0;int B = 0;switch (x)  //First switch{case 1:switch ( Y)  //second switch{case 0:a++;break;  Here the break terminates the switch that is closest to it, the second switch, and the output is a = 1 b = 100;

If the first switch is terminated, a = 1 B = 0;case 1:b++;break is output;} b = 100;break;case 2:a++;b++;break;} printf ("a =%d B =%d\n", A, b); return 0;}

Use conitnue to process illegal input:

# include <stdio.h>int main (void) {int I, J;char ch;printf ("Enter the value of I:"), scanf ("%d", &i);p rintf ("i =%d\n", i); while ((Ch=getchar ()) = ' \ n ')//The illegal character after I is processed. GetChar () is the character function, ' \ n ' is the carriage return. continue;printf ("Please enter the value of J:"), scanf ("%d", &j);p rintf ("j =%d\n", j); return 0;}

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Getting Started with C programming--switch, break, and continue