Microsoft Word - no14.docx

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1 ex26.c #define MAX 20 int max(int n, int x[]); int num[max]; int i, x; printf(" "); scanf("%d", &x); if(x > MAX) printf("%d %d \n", MAX, MAX); x = MAX; for(i = 0; i < x; i++) printf("%3d : ", i + 1); scanf("%d", &num[i]); printf("%d \n", max(x, num)); int max(int n, int x[]) int i, m = x[0]; for(i = 1; i < n; i++) if(m < x[i]) m = x[i]; return(m); str[][] num []

2 ex27.c int calc1(int x, int y); int calc2(int x[]); int num[2], n; num[0] = 10; num[1] = 10; n = calc1(num[0], num[1]); printf("num[0]=%2d, num[1]=%2d, n=%2d\n", num[0], num[1], n); n = calc2(num); printf("num[0]=%2d, num[1]=%2d, n=%2d\n", num[0], num[1], n); int calc1(int x, int y) x = x - 1; if(x > 0) y = y - 1; else y = y + 1; return(x + y); int calc2(int x[]) x[0] = x[0] - 1; if(x[0] > 0) x[1] = x[1] - 1; else x[1] = x[1] + 1; return(x[0] + x[1]); int int

3 ex28.c #define MAXLEN 80 int length(char str[]); int to_upper(char str[]); char string[maxlen + 1]; printf(": "); scanf("%80s", string); printf("%d \n", length(string)); to_upper(string); printf("%s \n", string); int length(char str[]) int i, len = 0; for(i = 0; str[i]!= '\0'; i++) len++; return(len); int to_upper(char str[]) int i, c = 0; for(i = 0; str[i]!= '\0'; i++) if((str[i] >= 'a') && (str[i] <= 'z')) str[i] -= 32; c++; return(c);

4 main array_sum_sqr array_average ex29.c #define MAX 20 array_sum_sqr( ); array_average( ); int num[max]; int i, x; printf(" "); scanf("%d", &x); if(x > MAX) printf("%d %d \n", MAX, MAX); x = MAX; for(i = 0; i < x; i++) printf("%3d : ", i + 1); scanf("%d", &num[i]); printf(" \n", array_sum_sqr( )); printf(" \n", array_average( ));

5 ex30.c /* */ /* */ double mulreal(double, double, double, double); double mulimage(double, double, double, double); void printcomplex(double, double); double areal, aimage; /* a */ double breal, bimage; /* b */ double creal, cimage; /* c */ printf("a : "); scanf("%lf", &areal); printf("a : "); scanf("%lf", &aimage); printf("b : "); scanf("%lf", &breal); printf("b : "); scanf("%lf", &bimage); creal = mulreal(areal, aimage, breal, bimage); /* */ cimage = mulimage(areal, aimage, breal, bimage); /* */ printcomplex(areal, aimage); printf(" * "); printcomplex(breal, bimage); printf(" = "); printcomplex(creal, cimage); printf("\n"); /* */ double mulreal(double xreal, double ximage, double yreal, double yimage) return xreal * yreal - ximage * yimage; /* */ double mulimage(double xreal, double ximage, double yreal, double yimage) return xreal * yimage + ximage * yreal; /* */ void printcomplex(double xreal, double ximage) printf("(%f%+fi)", xreal, ximage);

6 ex31.c /* */ /* */ struct complex double real; /* */ double image; /* */ ; /* */ struct complex mul(struct complex x, struct complex y); void printcomplex(struct complex x); struct complex a, b, c; /* a, b, c */ printf("a : "); scanf("%lf", &a.real); printf("a : "); scanf("%lf", &a.image); printf("b : "); scanf("%lf", &b.real); printf("b : "); scanf("%lf", &b.image); c = mul(a, b); /* */ printcomplex(a); printf(" * "); printcomplex(b); printf(" = "); printcomplex(c); printf("\n"); /* */ struct complex mul(struct complex x, struct complex y) struct complex z; z.real = x.real * y.real - x.image * y.image; z.image = x.real * y.image + x.image * y.real; return z; /* */ void printcomplex(struct complex x) printf("(%f%+fi)", x.real, x.image);

7 c = a 1 2 doible struct 1 1;... (); struct ;.. ex32.c /* */ /* */ struct ; /* */ ; /* */ ; /* */ mul( x, y); void print ( x); a, b, c; /* a, b, c */ printf("a : "); scanf("%d", &a. ); printf("a : "); scanf("%d", &a. ); printf("b : "); scanf("%d", &b. ); printf("b : "); scanf("%d", &b. );

8 c = mul(a, b); /* */ print (a); printf(" * "); print (b); printf(" = "); print (c); printf("\n");

Microsoft Word - no202.docx

Microsoft Word - no202.docx 1.4 ポインタと配列ポインタ変数は前回説明したように値の入っているアドレスを示す変数ですでは配列はどのようにメモリ上に格納されるか調べてみましょう ex07.c /* ポインタと配列の関係 */ int a[3]={1, 2, 3; /* int 型の大きさ 3 の配列として宣言 */ int *i; /* int 型へのポインタとして宣言 */ double x[3] = {1.0,