void drawLine (char c, int n){ int i; for (i=0; i<n; i++) printf("%c",c); printf("\n"); } main(){ printf ("top\n"); drawLine ('*',20); printf ("mid\n"); drawLine ('-',30); printf ("bottom\n"); } |
top ******************** mid ------------------------------ bottom |
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main(){ int a,b,c,d,x,y,m; scanf("%i%i%i%i",&a,&b,&c,&d); if(a<b) x=a; else x=b; if(c<d) y=c; else y=d; if(x<y) m=x; else m=y; printf("Minimum = %i\n",m); } |
int min(int p, int q){ if(p<q) return p; else return q; } main(){ int a,b,c,d,m; scanf("%i%i%i%i",&a,&b,&c,&d); m = min( min(a,b), min(c,d) ); printf("Minimum = %i\n",m); m = −min( min(−a,−b), min(−c,−d) ); printf("Maximum = %i\n",m); } |
// call by value 按值調用 void swap (int a, int b){ int t; t = a; a = b; b = t; } main(){ int x=3, y=4; swap (x,y); printf ("%i,%i\n", x,y); // x=3,y=4 no change } |
// call by reference 按址調用 void swap (int *a, int *b){ int t; t = *a; *a = *b; *b = t; } main(){ int x=3, y=4; swap (&x,&y); printf ("%i,%i\n", x,y); // x=4,y=3 } |
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// call by reference 按址調用 void allUpper (char s[]){ int i; for (i=0; i<strlen(s); i++) s[i] = toupper(s[i]); } main(){ char name[50]="chan tai man, joseph"; allUpper(name); // → CHAN TAI MAN, JOSEPH } |
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