c语言1（C language 1）.docVIP

c语言1（C language 1） C1 (1) #includestdio.h / / following function has given the function of head and body empty function, specifically as follows: / / (1) calculate the following function: piecewise function value. / / 3x+1 (-11 x -1) / / 4x-2 (x=-1) / / 2x+1 (-1 x 11) 107 / other / / (2): entrance function parameter x is given an integer. (3): / / export function return value is piecewise function value. According to the problem /, complete function under the function of the preparation work. Answer / reference, and error is inevitable, according to the answer, the consequences. Int fun (int x) { If (x=-11) Return 107; If (x-1) Return 3*x+1; If (x==-1) Return 4*x-2; If (x11) Return 2*x+1; Return 107; } (2) #includestdio.h #includemath.h / / following function has given the function of head and body empty function, specifically as follows: (1) / / function: Calculation of S = 1 - 1/ (2*2) + 1/ (3*3) -... Until, plus (minus) of the 1/ (n*n) / / just below the required accuracy value (Jingdu). / / (2): jingdu0 parameter, said when the entrance plus (minus) of the 1/ (n*n) jingdu cumulative stop calculation. (3): / / export function return value is calculated by adding the s value obtained. / / (4) Note: the function type is double. / / (5) that reaches a certain precision of the do_while cycle for general use According to the problem /, complete function under the function of the preparation work. Answer / reference, and error is inevitable, according to the answer, the consequences. Double fun (double Jingdu) the accuracy requirements of //jingdu value { Double s=0, p; Double i=1, t=1; Do {p=1.0/ (i*i); S+=p*t; T=-t; I++; }while (p=jingdu); Return s; } (3) #includestdio.h / / following function has given the function of head and body empty function, specifically as follows: / / (1) functions: completed. / / hint: a number of factors and is equal to the number itself is completed, For example: 6 / 2 factor is 1, 3, and 6=1=2+3, so the number 6 is finished. / / 28 i